What is this third connector for?

I’m trying to install a new head unit in my evo x and two of the connectors connect to the new unit but I have this third connector that was disconnected from my stock unit. I have the Rockford fosgate system. I don’t know how to hookup the amp also.

u/honus-wagner- — 1 month ago

Should I replace the condenser on my 2011 evo x gsr if I’m replacing the ac compressor?

Car has no ac. I took it to a shop and they replaced the expansion valve and it didn’t do anything. Then the compressor blew up and UV dye got thrown around my engine bay.

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u/honus-wagner- — 2 months ago