Here is how I installed the battery in my 2002 EC300.
I made a box out of some scrap Carbon Fiber tube I got at work.
And I mounted the Rectifier/Regulator to the box.
I also included the pigtail from a BatteryTender charger. So I can just
plug it in without removing the seat if I want to charge it at home.
I installed a toggle switch in the gage cluster, although I did not take a picture
of the finished work, for a main power switch.
Jeff