1992 Trident leisure battery

Hi AS enthusiasts, still a few names I recognise from a few years back when we had a Clubman 

Helping out a friend who's just purchased a tidy 1992 Trident 1.9 diesel with original arches, sills etc. Might seem like a daft question but where is the leisure battery? I expected it to either be under the bonnet/under the front seats/in a cupboard/under the rear seat/bed but nothing! It does have one somewhere, with the starter battery disconnected the habitation areas lights all work! 

Thanks in advance, Alan

Hi Alan
Nice to see you back, carnt answer your query ,however maybe The service department could help. 01386853511.
Mark and Alan have left Autosleeper.
Boaby