I believe on that model of EV, you'll find the aux battery in the back under
the cabinet.  We looked at one at a dealership and that's where it was
located because the driver's seat does not have the regular base - it
swivels.  My memory says it's accessed through the back door on the left
hand side under that cabinet back there in the bottom somehow... and is not
easy to get to.  You have to remove some cabinet possibly to get to it.

Madeline
15 Years of Westie Adventures
'90 Syncro Westie