Gen 2 Light Bar Install Help

Hello everyone,

I am in the process of installing an LED light bar for the front of my Prius. See pictures of materials below.

I keep running into issues.
1. It seems impossible to run the switch wire through the firewall into the cabin.
2. Even if I could, the 12v battery is in the back of the car.

I tried to hook up my positive wire to the engine fuse box where you are supposed to jump the car, but the vehicle would die after use. Am I allowed to do this but just doing it wrong? Is there a way for me to get power from the front fuse box?

Does anyone know how I can get power to the front of the car or run a wire through the firewall? Thank you for your help!