T6 Downlights On Leisure Battery

[VWT675]

Hi
I am looking for help with my T6. I have recently converted my T6 but the rear downlights are still working from 2way switch on passenger b pillar powered from starter battery.
I wish for these to be powered from my leisure battery and with the doors opening function.
Also to leave a switch on b pillar and on the switch control panel mounted on kitchen unit.
Any help, wiring diagrams, advise greatly appreciated.

 

[Howzat]

Just run a single fused wire from the LB+ to the switch. FInd out which lug is the SB 12v+ and remove it then attach the new LB+ instead.