Looking at the pinout drawing, this is what I see. Beares checking though?
I see pins 1 and 2 as being the control or "trigger" circuit . Battery comes in on one of them and goes out on the other, making the contcts move.
I would think pin 3 would be the incoming side and it is switched from either 4 or 5 to power one of those circuits?
But it could also be 4 and 5 are the incoming to connect to 3 to do something like light a light or turn "something" on?
Big question would be what is "something" and why do we want it to change??
Since the relay has their logo, I would feel it likely to be something they should know about!!
It's a very "special" situation when we sign something and say it's somebody else that did it!
But it looks like this withc different pin numbers and arrangement. We used to call them "slave relays" as it lets the little wimpy wires tell the big healthy ones what to do!
Like this, maybe?
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!