The SA can only be guided with an ST-4 cable. There is no other options for this specific mount. An RJ12 cable will work, just make sure it’s a 6P6C straight through type, and not one that crosses over. Here’s a link to one that I’ve used successfully in the past: https://www.amazon.com/dp/B01M0G7VP4/ref=tsm_1_tp_tc