The switch comes with wiring diagram. you can also get wiring diagram in descriptions and photo.

Cable length:37″ (950mm).

3 function signal switch for 24V 36V 48V Scooter, Switch Functions: Headligh Button( Self-Locking Switch), Turn Signal Light Switch(Slide Switch), Horn Button(Press-on Switch)

Fit for 22mm(7/8″) Handlebar,will fit most scooter go kart pocket Bike
Product description
3-function switch assy fit for Spotlight Scooter Electromobile Moped, with 37″ (950mm in millimeter) length cable.
The Switch fits all scooters / motorcycles / Bikes with 22mm or 7/8″ Handlebar.
Switch Functions: Headligh Button( Self-Locking Switch), Turn Signal Light Switch(Slide Switch) & Horn Button(Press-on Switch)
The switch is with 7 cores wire. Please see photo for Wiring Diagram:
Horn button: 2 white cores
Lamp button: 2 blue cores
Left Signal Switch: yellow, red cores
Right Signal Switch:green, red cores
Package includes:
1 X 3 function signal switch
1 X Wiring Dia