I have a '99 Civic DX Sedan, and I need to run 4 strips of 4 22ga. Wire from the inside of the car to the exterior for underglow and stuff. Anyway, I can't find a grommet in the firewall and can't find another place to wire them without them being seen. Thanks!! I also am looking for 2/3 ALWAYS ON fuses to tap off of. If you come across any, let me know what fuse numbers you used/found. Thanks!!

 

Then drill a hole.

This site will help you.
Mobile Electronics Basics - Ohm's Law, Diodes, Relays, and Resistors

Do your self a favor and run a dedicated fused +12V from the battery and put a switch on it.

 

Hot glu them to hide them.

 

Look to the lower right of your battery on your firewall. There's a grommet there that should pop out and the wire will go through right above the carpet on the passenger side. As far as running the wires, back in my high school days we used to run the wires in the side skirts of the car.