I'm going to say, no. If it's 3 wires then it's probably using the balance plug as the connection to the vehicle. The balance plug is used to balance both cells during charging. If you were going to go down to two wires for running, I would make an adapter cable that plugs into the old connector, but that's me. I like my Li-Ion batteries balanced and charged properly so they don't catch fire, but you do you.

They make adapters to convert the Tamiya and Deans to XT60. The newer HL tanks are all XT60 plugs.
I personally like the over-molded type like these, but make sure you buy the right kind (IE: male or female to male or female for your use case):
https://www.ebay.com/itm/296246373769?_ ... R6rHnubVZA