On JKs, where is the wiring for the reverse lights under the hood?

I have an SPOD hooked up, and a set of reverse lights wired to it. I also do have relay, as I want to be able to use the back up lights in two ways; 1) using the SPOD switch or 2) having the relay powered by putting the Jeep into reverse.

So what I need to know from you all is where can I tap into the revers lights under the hood?