I usually just cut off and replace the connector.
Note that the battery will likely be almost twice the weight which the heli may not appreciate in many different ways.
Based on my experience, the adaptor should be ok- just be sure the adaptor's wire gauge is the same as the wire from the battery and the wire from the esc.
Do you think the RE goggles are worth paying that little bit more for? It’s about an extra $100 AUD or say 30% more, any impact on filming or user experience over the Goggles 1 ?
I gave my drone to King IT not DJI, thinking they would replace...