hey guys, i want to mount my new yaesu ft-891 under the seat and use the detachable face on the dash in my mobile. my question is, the face connects to the radio with that telephone type modular cable. can i use just a plain old telephone cable to connect the two? or is the plug and wiring different? im trying to avoid spending $70 (ouch) for the separation kit because i only need the faceplate to radio cable and not everything else.