Does the primary on a transformer matter as far as hot and neutral orientation? If I wire the line cord according to the side that is switched I end up with the hot wire landing on the primary common lug. It looks to me like the neutral side is fused which seems odd. Then I got to thinking, with a standard old school two prong non-polarized lamp cord, it wouldn't have made a difference since you would then have a 50/50 chance of plugging the cord in so that hot actually went to the 115v lug.

I followed the brass lug in the service outlet to the switch for my hot. I am guess this would have been the "hot" side. This is an older Williams EM Epsilon puck bowler. I added in a fuse on the hot side, there is a fuse on the 110v run but it looks to me like it is on the neutral side. I had this thing apart for a while so it is possible there was another line fuse located maybe near the coin box but I don't recall seeing one. I am thinking a 15amp fuse for the primary since there is a 110v coil tied to it and I have a feeling that coil is going to suck some amps..