BenchRat

Hey there, I am relatively new to the world of automotive tinkering, and I had a kind of general question. Has anybody been able to get an MIB3 unit running on just a bench setup? I have an MMI screen, and an MIB3 Top High box I bought off of eBay but I think the wiring harness that I have is for an older unit and doesn't have the correct plugs on it. I am just trying to make sure it works, and can play files loaded onto it (preferably via USB). If anybody has any good resources for things like wiring diagrams, harnesses, etc that would be really helpful. Sorry if this gets asked a lot, but I figured this would be a great place for some helpful tips/tricks.