Leisure battery not charging - Autosleeper

[Pjg]

Hello
I hope I’m posting in the right place ….
My leisure battery on my T25 autosleeper is not charging. I’m guessing there must be a battery charger when on hook-up, but I can’t find it!
Can anyone tell me where this would be located?
Thanks!

[Mocki]

Autosleepers didnt have a mains battery charger as standard, but lets face it 30 years plus of previous owners anything could have been added or deleted …. The leisure battery would normally have charged from the alternator via a basic split charge , which is it was fitted correctly would have a inline fuse between the main battery and the relay , which you should investigate