Wall Motion Sensor Switch Key Red Wire And Two Black Wires Coming Out Of Wall... Which Wires Are Which?

Red wire and two black wires coming out of wall... which wires are which? - wall motion sensor switch key

I am replacing a light switch in the wall (3-way believe that name? Change) By a motion to. I removed the old switch, but now I have 3 son, I'm not sure what they are. Here is a description of these methods:

1 black wire - descending from the wall
1 wire and cable 1 black red - the climbing wall (for light)

My son is new switch has 2 black and 1 green line (talk about being on the ground in the instructions.) I think should go one of the black wire to black wire only goes through the wall and the black wire is all black or red, which goes to the wall. Then go with the green wire to the remaining cable.

The cables must go about it?