Installing one wire alternator

Make doubly sure that thing ACTUALLY has an integrated regulator.

At that amperage level, you need a BIG wire direct to the battery, I would not use less than no4 battery cable. Also double check the ground circuit. I know must industrial equipment has lots of framing/ metal, but if that uses EG rubber engine mounts, it may not actually be grounded as well as you think. You need a GOOD ground between the engine block and frame to battery, and if there is a separate ground stud on the alternator, run at least a no4 ground jumper from it to the block and from there to the batt neg, AKA a big main cable.

DO NOT run the alternator output line to the battery through any stock wiring and or stock ammeter. If you have an ammeter on the rig now, replace it with a voltmeter.

Since you have a pretty big load with those lamps, I would spend a bit of time calculating total draw on the system, and making certain the various feeds are up to snuff, meaning adequate wire size, in good condition, as well as terminations switches and relays.

Near a hundred amps of charging current is no joke.

When you get it all in, running, and believe that you have the battery "up and normalized," I would get an accurate multimeter and make certain that the battery is running at the required voltage, aka 13.8--14.2, when normalized, up to warmth, proper cell water level if accessable, etc. Check with engine running fast enough to charge, and check both with normal engine only running loads, and again, with all loads running, aka, lights, heater, whatever you have.