On a game like TAF, going in there and soldering/unsoldering 5 pop bumpers (not to mention keeping track of the wires) is a real pain in the ass. I'm redoing a set now, and I'm thinking of using something like a Molex connector when I re-install them so I don't have to solder underneath the playfield each time - much easier to unpin/repin a connector IMO. Anyone done anything like this?

Just realized I was a bit unclear - for the general wires, I am already putting on Molex connectors. What I'm considering is, doing something similar for the LED wires that normally get stapled and soldered.

Yeah that's along the lines I was originally thinking. Now I'm thinking of using something like this splice connector: https://smile.amazon.com/Connector-Solderless-Connectors-Stripping-Electrical/dp/B08929GXGK/
Then I can just pop it open to loose the wire if I need to service the bumper. I'll probably switch over to the insulated wire-type sockets, since I'm not sure the standard thin flat metal leads will hold well in the splice connector.