Easiest way I found was this:
>Original power cable for passport x500i plugged in to AC power outlet in glove box
> plugged into RJ11 coupler (purchased at radioshack)
https://encrypted-tbn2.gstatic.com/s...bykQs&usqp=CAY
>Extended phone cable plugged into RJ11 coupler and routed along pillar to radar.
This allowed me to "have hidden cables/power w/o cutting or splicing any wires". All necessary items (extended phone cable, RJ11 coupler) can be purchased for cheap. You're simply extending the power cable to the radar using a homemade extension cable.