Yes as long as you also have a channel you can plug into, I am using channel 6 or 7, I also use one for switching video between the FPV cam and my GoPro, I am doing this using a 7008SB Rx and it works fine. if you are using one of the smaller Rx's that only have three connections you probably cannot do it. I am using 14SG but will be the same.
What Rx are you using Tom?
Pete