89 SC with keypad entry

I bought an 89 Sc with the keypad on the door. I'm using the seats from a 91 SC that didn't have the keypad and evidently there is a switch on the bottom of the drivers seat that is needed for the keypad to operate. The plug has more rounded corners than the other plugs on one side of the plug. Does anyone have the switch for that plug that goes under the drivers seat?

Thanks!