bottom pcb and motor wiring

I'm repairing a 7d that has an error 20. I'm trying to make sure I have all the wires going to the right place on the bottom pcb, as there are a lot of them. There's also an open slot for a connector on the front I'm trying to determine if it's correct for it to be open or not.

Could I persuade anyone to just open one and show me a couple photos of it, or find one on the web? I can't find one.