From: Huddersfield, W. Yorks
That's really down to individual requirements, most van owners have fitted their own leisure battery so they can watch TV without the engine running.
If your van had one at some stage there should be the wiring for it. People put them in different places, behind the driver's seat, between the front seats or in the rear right hand side where the jack goes, or near it. Some have even made their own brackets and fitted them under the floor by the side door.
Phil 'n' Sharon
1996 Astro - American Road Ultra