I'm removing my steering column on my 73 Mach 1 to get better access to my clutch/brake pedal linkage that needs rebuilding and I can't unplug one of the harnesses. I got the grey one that has a right angle bend to it unplugged, but I can't do the other one that is a simple black one to separate. The two sides aren't fused together, I can get a small flat bar between the two sides and then have sprayed some silicone spray between them, but even with a lot of pressure they won't come apart. There's a red tab on the side that was under the locking tab that seems to slide up and down, but I've pushed it both ways and still no luck, all I'm doing is abusing the hell out of the plug housing. Any one have the trick for this? Thanks.