It seems obvious from the pic,that since two are already off, you know how to get them off
That position on the bulkhead, is supposed to be occupied by the S to Z connector. These are mostly low-current connections,mostly for front lighting. So,that connector usually pops right off,once unlocked.However,that connector does carry power to the headlamps. So its theoretically possible for those two wire-sets to weld the themselves inside the plastic body. This usually leaves melted-plastic evidence. I dont see it,so assume that has not happened here.In which case the metal connectors are probably just a little corroded. Perhaps a little penetrating fluid?
BTW; that dark blue wire between the start relay and the J-port should have a F-link on it. I dont see it there.That wire feeds just about everything on the car. To not have a fuse on it is risking a fire at the least and a total write-off at the worst.
That big fat 10ga Red wire should also have an F-link.As should any other power taps coming off that stud.
