La Finca motorhome

Does anyone here have a Fiat Ducato La Finca van? I just bought one but it didn't have a handbook for the habitation area and I don't know how to use it - I particularly need to find out more about the power control panel (see photo below) which no-one I speak to seems to have seen ever before! It's not made by ACE in UK but ACE in Spain, so not a Swift van. 

If you have a La Finca of any age, or any other van with a similar power control panel, PLEASE please help! I'll be very happy to pay you for a photocopy of any information that will help me use mine. I've contacted everyone I can think of, including the manufacturer in Spain who just send me to local dealers who know nothing about it.

Thanks!