Step 2: The beginning
To pull out the vents, use a screwdriver and pry them gently from the center out. They should come out rather easy. Use torx screws left and right side. Pull out entire unit, may require a little force. Don't pull it out too far, wires will still be connected.
I pried off this metal backing from an old hard drive. You can purchase a piece at a hardware store.
After prying it off, I figured where it would need to be bent in order to attach it to under the dash, between the vents.
Bend the plate in a vise, and flatten out an defects. (I also had to goo gone the stickers).
After figuring the placement, I primed, painted, and put a little semi-gloss on the plate