Print it clip down, then you don't have to use supports.
Use suitable glue (PU glue) to attach the holder to the coolant reservoir near the original sensor.
SHVCS plug just snaps in there, but you can secure it with a zip tie.
For:
Chevrolet Volt
Opel Ampera
Holden Volt
Vauxhall Ampera
The author marked this model as their own original creation.