I am looking for the part number for the extension cable that goes from the Sirius tuner to the stock connector behind the head unit. This is for a 2013 WRX w/o stock satellite radio. There are two of these cables in the Clarion kit, one runs from the satellite antenna (black box with a pink circular connector on end) down the driver side A pillar to a stock connector that is pre wired there in case SAT radio is added. The one I'm looking for (both are the same) is from the back of the Sirius tuner to the stock pre wired connector behind the head unit. Please help with any info. Thanks