It's time to connect the electronics to the CPX, then finish the body by hooking the servo to the front of the cardboard body.
Plug the JST battery connector into the Circuit Playground Express black battery connector.
Tip: If you need to unplug the JST connector, be careful not to pull too hard or the wires may break. Wiggle it gently while sliding it slowly out.
Don't forget, you can remove and reposition the Circuit Playground Express to keep the wires out of the way.