Key switch-relay-reducer-fusebox- switch’s

[Rvasq]

Okay, I’ve seen allot of posts about different ways to run the wiring for accessories but my plan is to run a relay from the key switch. I want the relay to power on my reducer (4wire, no key switch wire). My reducer will then power 12v to my fuse block as it is a 36v to 12v reducer. I have rocker switches that will control my accessories to the fuse block. Can somebody help me out with a wiring diagram. Specifically the key switch to relay to and how to tie the relay into making it power the reducer. I understand how things work but not very electrical savvy. I appreciate any feedback or advise. Thanks.