Overheating Circuit Board?

I think all the small wires will be consistent because I'm just moving them from one board to the other board. I'm just going to make sure the colors are under the same letter screw. I'll definitely send you a photo first though. The wires I'm asking about are the bigger yellow wires. On the old board the thick yellow wire has a thick green wire with it and it's connected to a screw labeled COM. Right next to that (also on the old board) is another thick yellow wire that connects to a screw labeled 24VAC. Those 2 wires are my primary focus. On the new card, the only remaining screws that appear to be the equivalent place to put those 2 wires are on a set of screws designated as 24VAC XFMR. In that section, one screw is labeled COM and the other one is labeled SEC. It makes sense to me that the thick Yellow and Green from COM on old board will go to COM on new board and that the thick single Yellow wire from 24VAC on old board will go to SEC on new board. I'm just trying to clearly understand where their new homes are.

source https://www.inspectorsjournal.com/topic/17341-overheating-circuit-board/?do=findComment&comment=178554