AquaBus Cable – 6′ Use this cable to connect Apex Systems and modules together. * The Apex is a modular system that allows you to connect many modules together in either a “daisy-chain” or star topology method. Use this cable to connect together the Apex, Modules, and Energy Bars together. Remember, although this is a USB type cable, the Apex does not have a USB interface. NEVER plug it into any computer or other USB device or it will very likely cause severe damage to your Apex or the device you connect to.