Pics on battery cutoff switch
Here's something to think about. The main cut off switches are usually OK, BUT, do you want all the amp pull the starter draws running through the contacts?
I know I've posted these schematics before. Any of them are "legal" for NHRA/IHRA, however, some are better than others from a safety standpoint.
The last two are the same type of deal with your alt. The S on the solenoid is designates the S605 like in the pic above it. These are set up for a race car that you turn the master off after every run, the s605 will be active at all times when the master switch is in the "on" position. If you decide to use an S605 in your alt line on a street car, switch it off a hot line when in the RUN position. This way it's not putting a constant draw on the battery which may result in a dead battery after a while.
On my cars, I run the bottom schematic, you throw that master and there is NOTHING hot on the car outside a 2 foot cube in the trunk. Does it cost a bit more to run the ford/jeep solenoid and an S605, yes. I'll take that cost over potentially burning my car to the ground with a hot starter cable or Alt line running to the front. My friend burned a challenger to the ground from an always hot alt line... Not for me thank you!