how to disconnect shift/park cables at button end

Its a 64, but the way the ferrules (metal barrel like ends of cables) fit between the steel prongs in
photo is same for in dash push button control unit. I tried spreading type pliers, but are too thick to get between
those prongs, and I'm chewing up the prongs with screwdrivers.
Floorable Deplorable. Put that on your front plate before I steal it for mine!