

Fuse taps
Short Version: 07 V8 Sport. Installing a high watt charger for a dash project. Which fuse should I piggy back? Always on not required or desired. And where/what behind the dash is a good ground?
Long Version: I'm installing a 12v, 100w power supply behind the dash for a discreet fast charger; only the end of cable will stick out and go straight to a magsafe wireless mount on the dash. Relatively hidden and discreet. This will let me sling the phone on the dash without faffing with the old X mount I was using andwith fast wireless charging.
I am going to remove the 12V 'cigarette lighter' plug and solder splice to the tap directly, with heat shrink, so that'll reduce some bulk. But hence why I need to know a good ground point. I have done something similiar before but it was almost ten years ago, so I'm rusty.
(Fun facts: The 100w is only on the type c, which is hardlined into the box. The USB-A port offers 18w, should I desire to a dash cam, it can off this set up as well, later on.)