Greetings from the U.K. I want to add a side camera to the James Cook so that the screen shows it’s image when the indicator is used. Then reverts to normal rear view on the screen. Can anyone tell me whether the flasher unit is upstream or downstream from the indicator stalk.? If downstream then I don’t need to worry about a timer relay to cope with the on/off flashing and can just take my side camera feed from the stalk. Thanks.