I have a 97 ZJ and the vacuum line that runs from the tee-connector ripped right at the firewall and I can't reach it to patch it from their but I see on other threads that the vacuum lines run inside the car and become other colors suck as red, green, yellow,brown,and black. And I've heard that the black is the main vacuum line and I'm wondering if it's possible to cut into that line from inside the car and reroute it to the tee connector without having to use the old line that was in the firewall and riped.

Vacuum lines

Black is supposed to be the main vacuum line and I want too see if I can cut into it and run a new line

Ripped tee-connector

Non-existent vacuum line at firewall anymore