EC3 connector

From the shop's description

EC3 Connector Female – Battery Side Perfect for electric power applications and works with any battery, charger, ESC, Power Meter, etc. Key Features Capable of 60 amps continuously Ergonomically pleasing and easy to grip Protected to avoid shorting and reverse polarity Superior technology suited to today’s advanced applications Designed with convenience and reliability Includes: 1 x Plastic housing 2 x 3.5mm gold plated bullet connectors