Hi,
I'm a relatively new E owner looking to install some electronics. I've read several posts on going through the firewall. Here is a couple of questions:

Has anybody thought of going through the clutch knockouts? (Are these actually knockouts?)

Where is a safe place to drill?

TIA
Chuck
W9CLM

Try here:

http://www.elementownersclub.com/forums/viewtopic.php?p=57272&highlight=routing+coax#57272

Use the search and you'll find that others have used this particular pass-through.