I have a Yaesu SP-5 speaker with a built-in LL-5 phone patch. The instructions show the cabling connected to a FT-1000 which has all the in and outs for this phone patch. It is not very clear to me how to connect to the K3. Appreciate if someone familiar with this could contact me off list. I can send the connection diagram to you. Tnxs, Jack W4GRJ