VIN location on melex 512 E?

[UnclePirate]

I screwed up purchasing a melex 512 E with zero paperwork. I paid cash and didn't even think of getting a bill of sale. Now I face a penalty for not getting it titled within 15 days of purchase as required under Arizona law. And I must do a title/lien search for MVD to get a bonded title which is going to cost me. I have the serial number but don't know where to look for a VIN. I'm disgusted with myself for not getting anything in writing. I should know better. I'm not going to do anymore work (rebuild) until I know that I can get it titled/registered. Without a title, I might as well scrap it.

Can anyone tell me where to find the VIN? That would at least be a start.