Fair enough David.
I may not be seeing it right but the holes on top look like they were for another factory tom mount. It wasn't originally a 303 configuration? The other holes could've been for a cymbal mount but not right for a 303, I know. Whilst the holes look a bit rough I seem to remember the 2 kits from this era that I've totally stripped down had holes like this under the mounts - hand done. In one case the they had drilled the mounting holes so close to the main hole on the tom mount that the holes had joined. I don't have any photos but I have my 202 kit in the studio that I could check.