Marinco Connect Pro 3-Wire Plug Marincos Connect Pro system has superior electric current carrying capacity that eliminates problems that rob motors of power and reduce battery life. The Connect Pro system features locking plug and receptacle and spring clamping connection, which provides a secure electrical contact. The Connect Pro Plug accepts 16 to 8 AWG wire and features an O-ring seal for waterproof connections. Built for long-term use, this plug is corrosion-resistant and has plated brass