I run my cable under my carpet through my car. What I did was put the starter on a Ford type starter solenoid that's in my trunk. So that way the large battery cable to the starter is only hot when cranking the eng. Then I run an 8 gage wire from the battery to the starter relay on the firewall where my car picks up its hot feed for everything. That also is under the carpet but I use a 70 amp fuse in a fuse holder bolted to the battery pos post as I wanted that fused and my alt output goes into that wire also. My 63 has been like that since 2006 so far and never a problem. You can just see the starter solenoid in front of the battery case. Ron