We have had several of these for a while now, and I've had no luck in making them work for much. These were designed for one generator and one generator alone unfortunately, which is the small multi-fuel generator in the pictures above. It's not really made for any other generators to include 831s, 802s or 803s, as they lack the communication capability nor is the motor inside the small box powerful enough to pull start an 831. That being said, I have turn several of the boxes into all-weather battery chargers, trickle chargers, or hardline chargers for our Stewart stevensons using the 24 volt charger out of a generator control module that we sell. The cables are perfectly capable of handling the power, and all you need to do is grab some cheap jumper cables and solder them into the output of one of the cut cables, preferably the starter motor out cable. The Canon plugs are super nice, unfortunately they are glued so they can't be disassembled on like some of them can. It's mainly something to tinker with, as the board is programmed for the inipower generator alone, and the Hardigg box is far from waterproof once you remove all the plates. One good thing that you will find is a couple of picatinny rails, which are used to clamp the starter motor into the box via a UTG angle mount quick clamp, but you will be sad only to find that the utg mounts have been machined on two sides to accommodate the goofy mounting process, so they're not worth much either. Fun to come up with ideas for it, but I'm out so looking for more!
