This is the Associated set of Connectors 3.5mm 3 Male/3 Female.
Associated Reedy’s new easy-to-install high-performance gold connectors provide a low-resistance connection in a compact package. Because they are available in two sizes, most applications are served.
Larger 4mm connectors are perfect for sub-C and Li-Po battery connections while 3.5mm connectors are suited for brushless motor connections and 1:18 scale battery connections. In all cases, replacing high-resistance connectors with Reedy gold connectors improves all aspects of a vehicle’s performance.
Three male bullet connectors
Three female bullet connectors
Solder and soldering iron - HCAR0776 and STAR2000