This is the Traxxas Traxxas connector - 4s (male) (2) - For ESC USE ONLY. #8527 jumper plug for unused battery lead. This varies occasionally.
The Traxxas Connector is ideal for users of Trx Gas and ESC (Electronic Speed Controller).
Traxxas Part #3070R: Traxxas connector, 4s (male) (2) - FOR ESC USE ONLY
Traxxas 3070R Traxxas Connector 4s (Male) (2) For ESC Use Only
Traxxas connector, 4s (male) (2) - FOR ESC USE ONLY TRA3070R
Traxxas Connector, 4S (Male) (2) - For ESC Use
Traxxas® Connector, 4S (Male) (2) - FOR ESC USE ONLY