I've done basically same thing. Except from the piggy back add-on fuse I ran that to a relay that powered a 40Amp take off from the battery (fussed at the battery) that ran inside the cab to a 12 position 12v fuse block from Blue Sea. From that I powered a variety of dash add ons, like the dash cam, rear view camera, TPMS, more 12v outlets, etc. All of it on a switched line. All of these wires were run hidden someplace or another. Clean and expandable.
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Fred & Denise (RVM157) New Mexico
2007 Excel Classic 30RSO & 2015 Mini Winnie 22R
2007 RAM 3500, Diesel, 6Spd Auto, SWD, 4x4, CC & LB
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