I have purchased a GSM4KC to work my currently fob operated E2 controlled gates. On the wiring diagram in the GSM instructions it indicates a volt free contact exiting the unit (figure 26) or 14v (figure 25 if keypad used as standalone) Where should either of these be connected on the E2 in order to make the gates cycle? I can see no mention of connecting intercom/keypad in the E2 instructions......any guidance would be much appreciated...tia