FYI (I see you're getting a new loom), the blue wire should be connected into the existing blue wire (amp remote) and the black wire should be connected to the existing black wire (empeg ground). There is a point in the cable where these "Y" off - you should be able to see the heatshrink.

This is where they have come from. I've not seen a harness like that though, if they fail they usually pull out of the crimps on the back of the sled...

Hugo