I know I saw one but can't find it in a search now.
Anyway I want to take the 99 obd2 connector off and put it in my ls1 car for obvious reasons.

It looks like about 6inches from the main connector some wires go in to a small plastic piece and from there even more wires come out.
So I got some wires going over toward the passenger side dash and some going up toward the gauge cluster.

Do I keep this second little box that adds more wires or do I just cut it behind the connector and rewire it back in?

Whichever way which wires get wired in where?

 

4 wires, orange is power, the blacks on the bottom are grounds, tan is serial data, and one more I believe white/black stripe is also needed. The Tan and white/black are in the blue and white plugs on the LS1 harness but it's possible the tan serial data wire is in the C100 connector on the LS1 harness.