Ok I will tell you what i did for my car:
First ( you may not have to ). I took some automotive electrical cable and extended every wire by about 4-5 feet. It may have been over kill, but it came in handy for my rear light.
Second (you may not want to ). I ran all the wires through a wire loom. There were four wires per led strip. ( 1 for each side ). Looks a great dealerbetter, and helped me keep track of them.
Then I fastened 16 gauge terminal connectors to the power and ground wires
from my control box.
Then i got a large amount of zip ties. There were about a foot long.
Then i secured them to bottom of my car with the zip ties. underneath the body i attached them to some black clips on the sides and rear of the car. And for the front I used some big silver bar I saw.
For the power wires. I ran the right side and rear tube down the same side. and ran them through a hole in the wheel well. The left tube's power wires were ran through that same hole in the wheel well.
I had the open the hole a bit wider. I used a screw driver and got the hole large enough. Your mileage may differ depending on the connectors you have.
Then I hooked them up, and then to my battery. I had a purely wireless kit. So i didnt have to run anything INSIDE my car. You may have to, and i cant help you there. I dont know of anyholes you can use.I am sure there are holes thru the firewall though into the passenger cabin. Somewhere.
Hit me up for anything else.