If it's just for charging current
(not motor current) then you will only need ~3A current carrying capability, but if it's for running the motor, then it will need to carry a much larger current.
The following connector is probably a bit too large for just charging use, but it is still an option:
![](https://i.ebayimg.com/images/g/IlQAAOSwQola-StA/s-l1600.jpg)
Click here for more details.However, if you were actually planning to power a Magic Pie though it, the connector should be rated for at least 25A and ideally 30+ Amps.
You could even use extra connector pins to share the current load, i.e. a 4, 6, or 8 pin connector could be used instead of a 2 pin connector using 2, 3, or 4 pins for each of the two battery cables.
If the connector pins individual current rating was 10A you could use a 6 pin connector to carry 30 Amps between 3 pairs of pins wired in parallel.
So, something like the above 30A 4 pin connector could probably be used, combining 2 pins for the positive lead and the other 2 pins for the negative lead.
As I'm guessing the 30A rating for the above connector relates to the whole connector - not each of its pins.
![Wink ;)](https://goldenmotor.com/SMF/Smileys/default/wink.gif)
For high current power connections, most people tend to use the large inline anderson powerpole connectors, and these seem to work fine even though they are not waterproof.
![](https://i.ebayimg.com/images/g/zccAAOSwaSZaM2HU/s-l1600.jpg)
Click here for more details.
Alan