Amass 10 Pair XT60H Bullet Connector Plug Upgraded of XT60 Sheath Female & Male Gold Plated For RC Parts by AMASS 4.6 out of 5 stars 55 customer reviews | 4 answered questions Amazon's Choice for "amass xt60" Price: $9.99 Free Shipping for Prime Members & FREE Returns These are good for 50 amps @ 16 volts because I tested them and found only very modest warmth after a few hours.
The wires need to be soldered onto the mini-lugs on the other end. I would not hesitate to use 8 AWG with these plugs and sockets. Terminals are gold plated and the male bullets are X sliced so a thin screwdriver can spread apart the bullet to the point of making an insanely tight fit.
SEE (!) what you're missing by not taking a moment to learn how to solder?