E46 Rear Fog/reverse Lens

[BIG UN]

hi everyone,hope you can help.

my e46 330ci came with clear rear lights all round,

they wernt to my taste so i sourced some red bottom/clear top ones

along with the boot lid fog ones.

ive tried to fit the boot lid ones but they seem loose:frown

ive clipped the outsides around the edge of the boot

but the insides of each lens are springing back up,

and when i shut the boot they pop out :angry: :blink: :unsure:

theyre proper oe bmw lights,the side light/stop light part of the kit fit fine,

been at it all evening in the dark and rain,but ive had to put the clear fog/reverse ones back in.its driving me mad,am i missing a way of pulling them in flush and tightening them please??

thanks for any help. :(