Just received a B1 Base unit to “improve” the low end of my L1 compact system. I also have the T1. Before I bought the B1, I visited a Sam Ash store just to be sure they are compatible. I was told yes. However, the cable connector for the B1 has its own unique style that my L1 doesn’t have to connect the two???? Nor the T1. I was expecting a traditional 1/4” cable connection since that’s all the L1 has. Is there a special cable or am I sending the B1 back to Bose???