The object needs to be printed on its side, carefully, using Simplify3D it allows you to place supports in both power button window, lens window and front supports.
I would also like to suggest you use Rigid Ink TPU - https://rigid.ink/products/tpu-1-75mm-0-03mm-tolerance
If you are using www.rigid.ink then following settings apply
Print at: 245-255°C
Heated bed: around 90°C
Speed: Lower speed necessary, around 20-40mm/s
Notes: Adheres well to Buildtak bed https://www.buildtak.eu
Carefully cut away the support structures with side cutters or a sharp knife...