just for future reference, if someone need to channel wires from the driver compartment to the trunk, here is the process.
1. remove side cover behind driver seat (next to seat belt) by removing one Phillips screw, and pulling up.
2. disconnect defroster wires, and set aside the panel.
3. use a flexible plastic rod and channel it from the top of the main wire harness.
you will have to move the isolation foam aside to get to the passage.
4. to "fish" the plastic rod on the other side, you will have to put the top in service mode, carefully remove the foam on the driver side rear corner.
as you can see from the pic, there are two layers of foam needed to be moved.
5. place the wires under the foam, and put it back in place.
6. channel the wires to the trunk.
i think this procedure can also be very helpful for someone who wants to install the IMS guardian.
once you are in the trunk, there are several OEM rubber grommet , that can help to channel the wires to the oil drain plug.