I'm halfway through STM's instructions, on installing their fuel pump re-wire kit.

I've searched hi and low on this site, but these steps are killing me....

#87 (yellow wire) - when cutting stock 12V pump wire, this is to the pump side.
#86 (black wire) - when cutting stock 12V pump wire, this is to the car side.

Attached is a photo of my voltage connection that connects on the top of my pump housing.

Does anyone know which wire i am supposed to spice?

Any advice is appreciated.