Thank you all for your advice. I agree with everyone who points out that I need only 2 spade connectors, but I look also to keep road splash out of the switch. Here is a photo of the pigtail. It measures 21/32 on the inside. If shrink tube will fit over the 21/32 switch OD and also shrink to the diameter of 2 wires, then that seems like what I should do.
1950 GMC 100 Panel Truck, 1958 270, 3-spd Saginaw with BW OD, 3.73 12 Bolt Differential from a 1966 C10, Front Disc Brakes Hill Holder Bought it in pieces 9-1976, driving since 6-1978 Follow in the DITY
