I think that goes to the common panel. Look for the PFT timer coils, they’re probably in the other column of that page. You should see a circuit showing SY getting power through a N/O SA contact from MG1 terminal which is on page 1, basically connected to SQS. It seems to be like a non-interference circuit to keep generators from starting at the same time.
It’s all on page 12 of this print
https://www.dropbox.com/s/rigybi92gddlac4/C-40375-77%20Dover%20Composite.PDF?dl=0
