A common practice when reassembling is doing a 'dry mount'. That is try to assemble most parts before they're finally painted. So when everything is in primer make sure all pieces fit all right in particular when you buy your scooter already dismantled. It's possible that some extra bending or welding is necessary so beware before you do the final painting.
When using new bolts and nut choose for inox types, they're a bit more expensive but it will be rust free for ever. Some dealers like Chambers (UK) can offer complete kits inclusive all special nuts and bolts for a fair prices. Don't waste your time go searching them locally you'll always end up missing some bolts.

Pay special attention to the cable routing use you're photos made when dismantling. Wrongly fit cables won't work very smooth.

The electric main cable was here also completely swapped for a new one. Make sure you buy the right with or without battery. Also on this scooter there was a pre and post modification possibility. This was a post-mod type which can easily been spot at the brake light contact which has only one connector.