Voltage drop issue- where to go from here

Well I pulled the dashboard out tonight (working on the gauge cluster anyways, and checking out the wiring behind the dash) surprisingly it only took me about ten minutes of work to snatch it out. So whats next? I think Im going to install my oil pressure, temperature, and voltage gauge in the non-functioning gauge holes. going to bypass the ammeter most likely anyways... I thought there was supposed to be a voltage regulator on the back side of the dashboard specifically for the dash???

Instrument voltage regulator is inside your 3 post fuel gauge