At least disconnect the battery, maybe remove any fuses, if any.
I would just make a 1/4" thick tab to mimick the size and shape of the original. drill and tap it and run some button head allen bolts down through. Then you dont have to worry about repainting the neck/frame. Any time you take off the factory finish the faster your asking for rust. So put some anti-sieze and a freshly painted new tab will be the only thing you will have to worry about rusting and or painting.