for those who have installed this carpet i have a few questions.

2000 camaro a3

where is the best place to start the first hole for proper alignment???
i have a 6point cage and and do not have the original front seat bolts any more, i ground them down cause they are not used. i still have the front rears though. its a pain in the a$$ to try and line up.the tunnel will only have a shifter so no console.

also after proper install will i need to trim off any excess??

the things been sitting in the car for a week now just getting some sun and trying to form a shape.