As always : a lot depends on (at least some more) details of how A-H- collaps actually happens.
Will there be uprisings in the wake of "
vicotry" ? How strong could they be ?
What kind of uprisings ? "just" nationalistic/ethnic triggered or also "red" tainted bolshevistic ?
And when would they break out ? Adfter the "big Peace Treaty" or some time later ?
(Important, as it could effect the amount of (still) present-on-the-spot german military)
How would this "Big Peace Treaty" look alike ? Without Wilsons 14 points and his focus on "freeing all the nationalities" ?
For the point of time the partition might occur :
I would say sometime AFTER the Big Peace Treaty has been signed. Prior to that as being included in the Big Peace Treaty (delaying its conclusion and final sigment) only, if there would have been unrests/uprisings (not due to
simple food shortage) inside A-H (not troop mutinies/desertions on(off the front) before the first armistices are concluded/requested.
However, in general I believe the germans would like to have a bigger (with the potential of becoming a stronger ally) Habsburg Monarchy around, perhaps (most likely) with the rightful emperor Karl I. as its head(ing figure).
Despite all this "all-german" talk around this would/should (in german eyes) include all of Bohemia and Moravia, perhaps austrian Silesia after a poll attached to german Silesia. so no "Anschlu?ß" of the Sudeten. They shall be happy enough with improved cross-border trading and other "privileges" (i.e. attending schools within Germany proper). That way - almost - including them into Germany.Not only looks better internationally but also eases administration, what was tricky enough the last ... about 350 years for Habsburg.
Such a
"Rump-Austria" (only as a "template") also encompass all/most of Krain (Slowenia) and Istria. The Trentino also ... why the hell should there anything being ceeded to a "looser" ?
Triest ? ... Depending on the "strenght of "uprisings" might become kinda "watched"guarded" Free city. Guarded by Germany

.
Slovakia ... Hmm, bit of a "wild card". Lot would depend on when, how and against whom (the austrians or the hungarians) such uprisings would occur and how "strong" nationalistic such uprisingd would be. From independant puppet state to part of Hungary or part of Vieanna-Monarchy IMO everything's in the ropes.
Poland will get "german-polish" solution (therefore under quite strict control by the germans), including Congress Poland and Galicia probably up to Lemberg in the East. The "rest" of Galicia will be ceeded to the germans "new friends/favorites" in Kiew, as well as the karpato-ukraine and the Bukowina. ... latter could also partially go to Romania.
@Halagaz haven't learnd anything yet aount such german claims on Catarro and/or Ragusa. Interesting piece of info. THX

.Possibly some "solution" as proposed for Triest, or some "lease" Macao/Hongkong-style.
The fate of Hungary and its "land empire" over other nationalities ... Beside some "corrections" on the slovakian border (infavor of hungarian minorities) I'm very unsure. Possibly something similar as Hungary looked during Akis-time, though with still larger parts of Transsylvania and the Banat.
Croation, Bosnia, Montenegro, the already carved up Serbia, Albania ... too many possibilities here to speculate upon by me (without further knowledge of the circumstances).