I was installing a new expansion tank and some general maintenance when I came across This PLUG on the passenger side, I don’t remember unplugging it and cant seem to find where it belongs. Looking up the part number 1-929347-1
brings up things about amplifiers and DSP
Its bundled and “Y’s” off from a group of wires that looks like come from the ECU to the radiator...

cant go much farther than the passenger side headlight
Thanks in advance!
P