Firewall access/grommet into cabin - Amp wiring

[minor_Legend]

Wheres best on my EP3 to run the stereo +ve cable into the cabin?

Nothing seems obvious & I'm not the sort to bodge before getting it right. Any pics would be handy. Thanks

 

[Chris.]

There's a grommet behind the air box. It's tight but doable.

 

[Kremmen]

Does the EP3 have the internal 'option connector' facility built into the fusebox?

 

[Chris.]

Not that I know off.