That should make things easier.... I'll save the link when It comes to adding some lights in the future.
What lights do you plan on using the harness for?
What about a lil Buddy heater? I have the BIG buddy in my garage and it works great!
https://www.webstaurantstore.com/mr-heater-little-buddy-portable-liquid-propane-radiant-heater-f215100-3-800-btu/778F215100.html?cnxclid=17031122550640356214819051118008005
I am not 100% sure I am correct and I am sure someone will chime in if I'm not, But I recall reading it at one point that the USB ports stay powered for 2 hours after ignition is off.
My truck did not come with remote start from the key FOB and so I bought this Start-X unit.
It's been working great for over 3 years now.
https://www.amazon.com/gp/product/B07F422Y98/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1