Battery relocated in trunk.

Inside passenger quarter panel over wheel well inside door sill then thru lower
pass. firewall (use grommet) across firewall over engine/ trans then down to starter.
Use a Ford type starter solinoid at the battery in trunk, this way the the cable is only
"hot" when engine cranking.
If you do it this way, how does the alternator charge the battery?
Ima guessing you run a separate full-time charge wire...