Help! Electric washer switch dash location? Pics?

Easy if you have/get the correct wiper switch. It should have a terminal marked "W" (I recall), which sits fairly far from the others. You also need one that matches your wiper motor. Most were simple 2-speed. The variable-speed wipers had a much bigger wiper switch. You can find photos here and on e-bay.

One thing that confuses people on the wiper switches is that Mopar used the switch as a convenient terminal to connect 12 V power to other devices. Just follow the wiring diagram and don't worry about "why is my wire for ___ going to the wiper switch?"