The easy way is to mount it in bumper and splice the cable on the camera line into the reverse light wire to active automatically when reversing. The rest will depend on your head unit and camera, so follow their instructions.
Just did this to my 05 about 6 months ago. T-tap connectors were a great find for splicing into wires.
https://www.amazon.com/dp/B081PVPZZM/ref=cm_sw_r_cp_apa_glt_fabc_BXBSZYZX9B0WD47S92MV