To prevent the printer to be placed too near to a wall and to prevent to break my alternative Y Endstop mount (thing:3189762) there are some spacers to extend the frame in the back.
You can choose if you want only the spacers or you want to put the lid on them. Both you can download.
There are long enough that also the printbed with the connected heatbed cable will not have any contact with a wall behind.
To mount them it is necessary to thread M5 into the aluminum profile. Additional for mounting you will need min 4, better 8 screws M5x8 or longer.