Either way is more comfortable for you. I do know that it easier to run the amp power wire from the inside.
You will want to remove the lower part of the dash to get to the molex. It should screw off.
133whp-126ftlbsTQ Eclipse CD8443,JBL Px300.4, JBL GTO7001, PPI 356cs, JBL p1024(Hooray!) SubThump enclosure, RAAmat BXT, Damplifier Pro
Hatch Nation #140
Caeci caecos ducentes