This video display 2 kinds type product, such as jl-205c photocell sensor, and jl-200x-14. jl-205c photocell has 3 pin metal plug, it is compatible with ansi c136.10 standard. another side a spect, this jl200x-14 nema 3 pin base, or 3 pin connector is design jl205c stadly fix on street light base.

open way or close way this photocell kits. open way: you can clockwise this jl-205c until plug-into base; close way, and you can Counterclockwise photocell until leave this base.

ヒント, this jl205 base with 3 pin metal pin have different size and length, and you can checkfull base with 3 hole. so you can distinguish connect between photocell switch and base, so you right way clockwise plug-into this base.