Ok. Interestingly, the guy who is running the other auction may have made a mistake on the application chart of his because he lists a bunch of C body models that use the mercury switch style as early as 1969 "TRUNK LID LAMP- COURTESY LIGHT OPTION 69 70 71 72 73 MOPAR 71CN2-6W3"

My 71 Roadrunner uses this style too and it's not even on his application chart.

I believe yours can be taken apart to be cleaned and inspected if the back end does not have a piece of molded plastic preventing the removal of the 2 wires .