The wheel hasn't been shipped and I've yet to order the Velocharger
In that case you may be interested in the PedalCell - a dynamo that attaches to the fork and works like a conventional dynamo except it has some doowhackery that makes it more efficient than a hub dynamo.
I am NOT advocating it - just throwing it into the mix. There's a thread on it here somewhere. I have questions about its longevity and use in inclement weather.
FWIW I use a Cycle2Charge (available on Amazon) to power as I ride. Very simple, neat, very weatherproof and tested in some pretty tough environments.
I'll need some 4.8mm spade connectors
Do you plan on also using a dynamo light? In which case a type of "double" spade connector is available that allows a light to piggyback on your velocharger (or vice versa). Switch the light off when you want to charge. SJS cycles have them. Best when the two connectors are soldered together and wrapped for weather protection.
Sorry if I've just thrown chaos and confusion into your plans.