SMA connectors (all connectors, RCA, BNC, whatever) have a positive and a negative side. The clip of course, has only one. If you do connect your wire antenna to an SMA connector, talk to someone about whether you should ground the antenna wire. It's beyond my knowledge. My guess is that for receive it won't make a noticeable difference, but find a good BB for this kind of stuff and ask there. You need the ground for transmission, but I'm not at all sure about reception.