There are two different housings. The standard housing is to be mounted on a horisontal 2020 extrusion like in the pictures. The other one is for mounting it on a vertical extrusion.
Both use the same back cover.
The models are oriented correct and does not need supports.
A build-in support marked in red need to be removed after printing

Place the thermistor in the back cover with 2 mm extra cable.
The cable need to be in the correct opening to hide it inside the extrusion.
Slide the back cover into the housing to lock the thermistor in place.
The author marked this model as their own original creation.