These are easy to work with read the full description https://www.ebay.com/itm/Flex-A-Lit...NaXSWp:sc:USPSPriority!85037!US!-1:rk:27:pf:0
Here is a better picture. I used some 1/8" aluminum and made a plate to mount the controller and relays to. I used circuit breakers instead of fuses.
Mine required a 70 amp relay kit, which I got from Ron Francis. It had to be tied to the trinary switch on the AC. My trinary switch is on the AC drier (in engine compartment), but I installed the relay under the dash. Keeps the engine compartment a little cleaner, and keeps all the connections out of the weather.
Hopefully I can patch in a pic of the above mentioned A/C relay and fuse. That is the Ron Francis Express wiring panel on the left kickpanel, btw. Made for my car, it has a serial number on it registered in my name.