Item is come without instruction about connection and use and probably allot of people think item is damaged.
Not have Light Plug, Connector but dont worry you found here:
https://www.ebay.co.uk/itm/152536039159

For working front light you need:

- Switch off your bike
- Take out your battery.
- Install your front light to eBike
- You need 1 Light Plug Connector for Y-cable and grimp to wires
- Connected wires properly ( + plus, Blank with Withe line wire) and ( - minus, Black wire)
- Put back your battery
- Turn ON your eBike
- In my case I turn ON light button to Yamaha controller
- Now you need tu push middle button for 2-3 seconds ( on/off power switch for the handlebars) until the LED iside to middle button turn ON
- Now press again middle buton and front light to ebike switch ON, If you press again middle button front light switch off.
- When Light is ON you can adjust high beam operation and for that you need to push shortly the Arrow button.

My Front eBike Light working well and I bought with good price when I compare with any site.