yeah i've seen a pic of what it looked like going through that boot and it just didn't look right to cut that. idk i've drilled a lot of holes and all but cutting that boot and running wires through a mechanically moving area wasn't what I wanted to do. I would say find the whole in the firewall. and go through there. I would run mine through there but it would be a good hours work re running all of my wires. just don't have the time right now.
k ill find a hole that i can go through and try to reseal so that dirt and water cant get through.