Wiring headlight switch

Go over to MyMopar and look at a wiring diagram "for just about anything" in the same year range. Those switches have been the same for years. Use an Ohmeter. One of the two in question will go to ground (mounting frame of the switch) when the button is twisted "and hard" "click" all the way to the left. That is the ground leg switch for your interior/ dome / courtesy lamps. The remaining one (OEM original) was tan, went to the INST fuse in the fuse panel, and then to the dash dimmer controlled lamps.

You can choose whether you want "traditional" or "always on" parking lamps. If you want old school (park lights out with head lights on) hook the parking lights to "P". If you want them to be on with headlights, hook them to the "T" post with the tail lamps which is what Ma did later on in the '70's