I need to run another cable from the engine bay thru the bulkhead from the battery for my Accumate unit. I've already got a large amp feed going through the commonly used one on the passenger side and can't fit another thru the same route. I noticed another unused grommit near the top of the passenger side bulkhead tonight which has a double washer pipe connection next to it. It has 40P written on it and behind it you can see something black. Anyone know where this one comes out inside the car or used it for getting a feed thru?

Car is 2003 WRX.

Thanks,

Andy.