Converter help

Hi guys so I lost the instructions for my converter from N old setup. This will be going into the Tacoma. Was wondering if anyone knew about this model. It is the peripheral sven2. At the bottom there are 2 white wires. 2 gray wires. 1 black. On the top there is 1 black along with the RCA. Just wanna know what the bottom wires tap into

 

This is all I found trying to do a search. Hope it help or someone that know this unit can help you.

 

I had found the same thing, I reached out to a friend that helped me in the past. Thank you for helping.