When you're sitting on your robot, you may want to have some means of controlling. A joystick
works great for this purpose.
I mounted my joystick in a small box made of sheet metal and some plastic sheet. The emergency stop switch is also mounted to this box. To attach the joystick at a comfortable height for the seated operator, I used a piece of square aluminum tubing. The tubing is bolted to the frame, and the wiring for the joystick and emergency stop is fed through the inside of the tube. The joystick box is mounted to the top of the aluminum tube with a few bolts.