running the DB-25 to the front

running the DB-25 to the front
fishing it through

Carefully feed the DB-25 down through the opening between the shelf and the rear firewall. The rectangular shape of the connector allows it to easily fit through the space.
The db-25 cable will be run to the small opening under the rear carpet flap in the rear of the e-brake console.
If you have trouble getting it between the aluminum firewall and the wiring shelf behind the seats, you may have to bend the stock harness and ground wires slightly to make room for the db-25.