I have it cable locked but I going to put a piece of stainless rod I have laying around and secure to the handle with stainless hose clamps. That will make it a 15-20 min job and should deter everyone except the person that's going to get it no matter what.
On my eu 3000 is I put a piece of 5/8" rebar through the gen rack holes and through the "legs" on the gen and welded the bar to the rack. I didnt plan on using it around the house. And if I need it off I can cut/grind the welds easy enough.......BTW, I bought my Octane with an Alaska trip in mind. I tried a couple of times to do the pipeline road (Dalton) on my BMW 1200 gs adventure , but never made it. I'm in NY and I would need at least the same 2 months as you. So my trip will probably have to wait till I retire. Good luck! I'm jealous.