Wire it the same way as the older RV's where you need to unplug from shore power and replug into the genset. But you are going to be attempting to power a rig with about 1/3rd the power that it was designed for. I hope you realize it, going in. Few people have automatic awareness of how much power their rig is sucking unless they have a power meter where it can be monitored with ease.
The rewards of loading a generator to "almost where it stalls" are few. Usually the genset will let you know it does not like your duty roster by failing,
