This is a simple box for switching dynamo power to either a kLite Dual USB charger or an XT-90 connect for a headlamp.  Two single pole double throw switches can be attached through the holes in the top.  The XT90 connectors can be held in place by compression bars of plastic.  

I designed this in a day as an emergency solution for a friend before a cross-state ride.  it worked out really well :)