I have got an electronic speed controller as pictured in the first image. What kind of contacts are those on the left? The second image is a closeup.
edit to clarify question
I am asking how to physically connect these contacts.
Are these pins or plugs? Are they for soldering? If yes what is the advantage over just soldering two wires together.
solder cup
..... do a google image search if you like .... slip the heatshrink tubing on to the wires as far away from the connector as possible, solder the wires, wait for connector to cool, slide the heatshrink tubing over the connection, use a cigarette lighter to shrink the tubing $\endgroup$ – jsotola Feb 8 at 21:56