my dear friends, in an ir3300 one customer attached a system box named as BILL BACK ADVANTAGE . from that box a four pin connector cable was connected jack number J1060 of main controler pcb. now we instaled a new ir2530. customer need same system box in ir2530 also. where shall i connect the four pin cable in ir2530? if any optional i have to connect? kindly please give me your idias and advises. thanks in advance.