Hello; I have a long history with Airtronics, and tell people to look for the red wire (the hot lead), Fut and Hitec use the centre wire for red. Earlier Airtronics radios used an end wire for red until 2002 or so. The current Airtronics had the red wire in the centre, but the plug is a bit different then Fut. The Fut tabs have to be trimmed to work in an Airtronics reciever.