Actiontiles Smart Kiosk - help we with electrical connections [photos]

So I'm in the final stages of my Fire HD 8" Kiosk which will display

actiontiles for SmartThings and my outside cameras. Can someone tell me

which wires in the box I would connect to?

Switch on left goes up to bathroom fan. On right goes to ceiling light

fixture. There's another GFCI plug over the the left and an power outlet

below the Tablet location near the floor.

Based on the instructions, which nut should I tap into?