Lss Ground Busses

I've got a 1996 oldsmobile lss. Occasionally the car will die, and power windows, seats, and locks will not work. After reading some of the other posts, I think it may be a bad ground bus. I checked the drivers side, and one of the terminals looks bad. My question is, how do I get the wires out? I've gotten the metal bar out no problem, but I cant seem to get the connectors out to clean them. Also, the plastic wiring around one of the wires basically broke off, so the wire has been exposed. It looks kinda rusty....does it need to be replaced? Thanks.

Welcome to AF, you can cut the connector out and resolder the whole deal and reconstruct the ground harness connections at that junction, the corrosion usually " walks" up the inside of the wires anyway.