Sorry for the elementary question but I purchased an Infinity AMP and wanted to know where to connect the Trigger or (RMS) cable to the Stock premium HU. I believe that another post made reference to the gray wire but I am unsure. Please advise. :bow:

"Your out of your element Donney!"

if you do a search for xb gen 2 hu wire, you will find the gen2 wiring diagram. i am almost positive it's the grey wire, but don't quote me on that.. it's grey on the gen 1

its usually a blue wire on aftermarket HUs but dont know about the stock one