Might be a noob question but i have a manual 335 and just bought the 2step relay. Is there a way i can run the 2step relay without buying that BMS cable that the instructions tell you to do? It looks like the only reason why id need the BMS cable is for monitoring/tuning from a tablet or a PC. I plan on running MHD soon so i feel like i wouldn't need the BMS cable so thats why im wondering if i need to waste $35 on a cable. Thanks for the input!