In order to install alternative headlight, you need to connect it to Mate controller via 3-pin female connector. Since you will not find the lights with this specific connector, you will have to buy a cable with this connector, cut it and connect the 3 wires manually.
This case covers these specific lights with horn and this specific cable from Amazon. The light has black, red and green wires. The cable has black, white and orange. You connect the wires black to black, red to white and green to orange.
If you go with the cable from AliExpress, you will have black, red and white wires.
black to black, green to orange, red to white 
black to black, green to orange, red to white
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