Sledge Learning the E-waste ropes.. have some compliments and questions!

On the power supplys for later model computers, on the power cables, there's a thin black plastic plug.
Its got Gold plated contact tips inside it.
The plug often goes 'inline' on the power leads, like its not right at the end of the cables. There might be two or three on the same set of wires.
You can pop the back off the plug and rip the individual power wires out as they are pressed into the end of the actual pins of the plug.

Whatsa name for these plugs? What are they classed as?



I have just been ripping them off the cables, then cutting thru the plug so it cuts loose the Gold plated bits, then putting them in a jar with other such plated pins and stuff.
And chucking away the rest of the plug.