Adio wires

[Baytownvalkyrieman]

I just bo't my '99 Interstate and love it but have this question.  There are the usual 5-pin connections for the radio and intercom but the previous owner added a JM CB radio and there is the 6-pin connection.  Is there any thing out there that I can use to listen to both at the same time so I dont have to even think about switching back and forth between the two while riding?