If you want to use CV and gate to control you Roland gear, run cables from the BSP CV sockets marked Pitch to the CV inputs on them and match them with the Gate outputs to the Gate inputs on the same instrument you sent the Pitch to.
The socket in the middle marked Velocity (on the BSP) is the velocity of the note you have played (how hard you've hit the pad/key is what sets it) and is the MIDI velocity sent (0-127), but if you are not using MIDI at all you can set that to any value and it won't affect the volume of the notes. So you can either use it as the velocity CV and send it to a VCA modulator input and it will adjust the note volume in the same manner as MIDI velocity does, or send it to any other CV input such as filter cutoff to animate the tone (or use it there as a velocity expression type modulation). Just plug it into any CV input patchpoint on your synths and listen to what happens, it's a great way to learn what each does and how to modulate each in a way you like!
