Syncing your Korg Littlebits sequencer can be a bit tricky unless you have the official break-out bits, or a SQ1 sequencer too hook it up to. I multimetered the cables between the breakout bits:
Red = DC current.
Orange = trig.
White = ground.
Turns out the kit actually speaks normal trig signal, and the internal trig is about the same as the trig from a drum machine (in this case a Boss DR110). So we cut the orange and white cables going into the sequencer and joined these the wires from a cut mini jack cable. Voilá – external trig!