Battery in Trunk Wiring That Exceeds NHRA Requirements

Great thread guys, Im ok with how things have been explained, I like the main supply to the starter be off unless starting and the relay that interrupts the charge wire from the alternator to the battery.
I have my EFI ECU on the firewall where the heater box used to reside, I have a 120A three wire alternator, I have a charge cable from the alternator directly to the battery via the ECU panel which is where I take off power to supply lights etc, I had planned to put the CD relay on the charge wire on the ECU panel and then simply continue the charge wire back to the battery, is there any issue with this?
alternatively, in order to kill the alternator charge, rather than cutting the main charge wire can I simply cut the much smaller voltage regulator field wire going to the alternator?? will that kill the charge? what it means is I can use a much smaller relay to control the Alternator over a large 200A CD relay on the charge wire