Any idea what this wire is for?

[Bradydz]

(if you saw this post previously, I reposted because it was moved to truck audio, which doesn't really even make sense..)

I bought the LMC keyless entry kit, and when I opened it, I understand what to do with everything, except this yellow wire. It connects to the controller away from the rest of the wiring harness, and it is not mentioned ANYWHERE in the instructions. Anyone have an idea what it's for? It splits into two wires, and is only about 4 feet long.