I've put this little kitchen in and it has freestanding fridge and freezer to go under the counter. i was going to put an end panel on the side of the drawer base unit then and end panel between the appliances. This leaves me with about a 50mm gap between the last unit and the wall, My plan is to scribe an infill panel but im stuck on how to fix it. If it was a cupboard i would fix the infill to that.

I obviously need to fix it to the wall but id like it to go in after the appliances to give me some wiggle room when sliding them in. 

 

Hafele Drawer & Panel Connectors Cream White 10 Pack - Screwfix I've seen these fixing that look like they are what i need but are they a fit and never come apart setup? As id like to make things a bit easier when taking the appliances back out again etc.. 

 

 

 

Batten on the side wall and Two part velcro. Easy on and off. Either that or magnet catches. Both available from screwfix i believe.

as mad as it sounds, I quite like the velcro idea.

I've used magnetic catches myself. Works well.

I put such a small panel on normal kitchen door hinges so  I could it pop open when the need arose.  Velcro or magnets would do the job too.