73 Valiant Headlight Swtich *(Harness - Plug - Connector)

Just wondering about a Headlight switch connector - Looking for a Seven 'bay' Plug for the Swtich.
Very hard to find~! One on E-Bay charging $80? Looking online here long enough and trying to peice things together it looks like a Jeep Headlight Plug 73-86 is the same exact thing?
Crown Automotive - product~! AT a Fraction of the cost...
A link to an example of the product here...
https://www.4wd.com/p/1976-Jeep-Che...term=4579878251661351&utm_content=Ad group #1
ALSO - Many other Chrysler Dodge Swtich plugs have two extra terminals 0 These also like they will fit the swtich? Why not use a 9 terminal as long as the wires are connected correctly? What are the two extra terminals for?