WI: South American Central Powers members

Let's assume the 1902 Venezuela Crisis leads to Latin America deciding to get patronage from either Germany or Britain.

how would this affect WW1?
 
If you have any (even one) South American country joining the Central Powers you dramatically increase the odds of the US getting involved on the side of the Entente much earlier...
 
If you have any (even one) South American country joining the Central Powers you dramatically increase the odds of the US getting involved on the side of the Entente much earlier...

Who would be the most likely candidates to join the Central Powers?
 
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