Chosen Solution

How do I get a replacement plug for the left speaker as the pin in the plug is cracked

Based on pictures on the connector, you might be better off replacing the damaged part connector with a DC plug style system. Order up a DC male/female plug set like this one and solder one connector to the board where this weird “left” connector used to be. Then strip and solder the other adapter to the cable you have now. Should be a solid connection forever.

Oh right thanks for the reply. Is there anywhere you can just get another connector and solder it to the wire?

looking for the same item, pin in left speaker plug broke