ok, I think I remember now, I think it's C729 and C731 that's the either-or. lol
I'd have to compare a 7400 and 7500, just for fun. they're loosely based on the previous U5000 model where you had 2 headers in the middle of the board for either 15k or 24k operation (that's standard or medium res) and I happened to notice when I was working on a Ms. Pac/Galaga monitor that where those headers used to be, there's still wiring arrangements, and they're different between the 7400 and 7500, and those 2 cap locations.
before I ever did my first monitor cap job, I did a LOT of reading up on it, and there's a few rules: 1) voltage rating can vary, microfarad rating cannot (unless it's one of these whackjob monitors... they changed that shit) 2) if there was no cap there to begin with, leave it empty. 3) always verify your work! I've capped monitors in loud game rooms, and I've observed I made the most mistakes under said conditions vs. doing it after we were closed.
way I started capping monitors the last like 3 or 4, I did the biggest caps first, and I always X off what I changed. sometimes I forget to, juggling an iron and a desoldering iron. when you get to the really small ones, that's when you start sorting them all together. other instances, you'll get kits that have caps with variations, and that's when it becomes a pain in the ass.
throw another monkey wrench in when you're dealing with these Wells monitors and the solder pads get toasted.
I learned the hard way that you can do like a 2 hour monitor capping (in loud settings, mind you, with workers asking questions every 2 minutes) leaving the irons plugged in the whole time. they reach a point where they become ungodly hot, and that's how you can start doing damage. so take a break every 30-45 mins.
there, that's all the advice I have left to offer lol