In my old LS-4 (#4008) there were three hard points installed in the
luggage compartment for a Winter barograph.
You can bolt your battery box to them.
(Made mine out of glass, with a webbing strap to secure the battery.
The cable run was easy.)
Jim

On May 15, 11:38 am, klie wrote:
I am looking to put a battery behind the seat, on the rear deck of an
LS-4. Any experience or advice?

Don K.