Just looked at the battery and connectors, the battery is rated at 30A max, the tamiya connectors are only 15A max, so if the GTB does it's job, and depending on the motor, it could be pulling more than the 15A max a lot of the time and could quickly overheat the connector!!!
I'd suggest you going deans
I have GTB and brushless motor and use corally's now, but have used both corally and deans in the past on nimh's.
Hope it helps
