Internal lighting switch relocation

[SteveTA]

Good morning all. I am due to be having kombi seats installed in my 2018 T6 next week. In the NS c-pillar panel, the previous owner has installed an on/off dimmer switch for the ceiling spot-lights - nice job but switch needs relocating as will be in way of belt installation. I have the replacement panel and belt guide ready and know where I want to relocate the switch to. My question is do I need to remove a fuse before I remove the switch and isolate the wires(using terminal blocks?) - if yes, where will the fuse be. I'm not overly bothered about ceiling lights not working whilst isolated pending switch relocation but if fuse removal is necessary, unsure if that affects any other electrical items in the van - would just appreciate some guidance/reassurance before going at it all gung-ho. I have had a look at other similar threads on here but couldn't find anything specific to my situation. Thanks, Steve