Bongo Fury

Any recommendations for a local outfit that will do some electrics for me?
I have two batteries in my bongo, and I'm not sure how or if (what I presume to be) the leisure battery is configured. I have an external camping plug I want fitted also.
thanks!
Stu

Take a look at the list here: https://igmaynard.co.uk/servicing/#london-south-east