I plan on installing some of my audio stuff from my old car into my Lancer (2010 GTS) in a couple weeks.

Does anyone have any suggestions on routing the subwoofer power cable through the firewall to the interior? On my previous car there was an unused hole with a grommet in it on the passenger side which ended up behind the glove box.

I looked around inside the engine cmpt of the lancer and noticed what looks like a possible spot but I didn't reach in to check it out in detail, figured I'd ask here first if anyone's had any experiences to share.