I don't have it in front of me.... but I believe that it was the square drive on mine, typical to almost everything in the RV...I could be wrong, but #2 Robertson if memory serves.
IMHO, that's one of the few things they got right.... I find square drive to be far superior to phillips (and posidrive...and whatever that other common one that is often confused with philips too)
for what its worth, those screws are combination. can use the square bit of a phillips
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