High capacity relays are expensive. Does an individual really need a connect-the-dots explanation for a simple post? Hmmm...
Either this thing will be of interest or it won't. People who do electrical on their rig would recognize the value of the relay. Solly cholly no drinkee nor use drugs.
You won't find another "200" amp relay unless it costs ten times as much.
Regarding my "mysterious" postings - if they are of no interest ignore them. They will appeal to some. Like a six-foot redhead with humungous..........(feet?)