I have an old Icom IC-730 radio. it has an 8-pin mic and the old 24-pin ACC port. I'm interested in getting a SignaLink, but want to make sure I understand how it would connect to my radio. According to the SignaLink USB Product Guide, I need SLUSB8R (main unit), SLCAB8R (8-pin mic cable), and SLMOD8RI (jumper module). I understand how the unit would connect to my microphone to transmit, but i don't understand how it connects to the receive audio. Do I connect the headphone jack on the radio to the Speaker 1/8" jack on the back? Do I need to use the 24-pin ACC interface? Also, do I need the jumper module? It looks like people use short wires to connect the SignaLink cable to the Mic, PTT, etc pins.