The ECM is over the tool box at the rear. 2 small screws hold the tool box on one on each side. Take the 2 screws out and pull the tool box back towards you and down at the same time the ECM is mounted on top of the tool box
The ecm is up under the handlebar area on that machine. Do you have a service manual? It will be needed to get the correct wiring colors to test stuff. Free downloads all over on here if you don't have one.