welcome.
you could make a dean's plug serial adapter, or buy one cheap from
here (bottom of the list). that's what i'm doing, only i have 2 wired together using a parallel adapter (3s2p) and connecting it in series to a 2s2p pack, for 5s2p total.
what controller are you using, and what vehicle? 6s2p might give a more consistent result, as long as you have a controller that can handle that much.