led tail light

1978 Kawasaki kz 650 sr
how to wire a universal double led cat eye tail light that has 4 wires[red-white- yellow- black]
to my old light wiring that has 3 wires [blue-red- black/yellow stripe]
help- help
thanks

The original wiring:
Blue: power for brake light.
Red: power for tail light.
Black/Yellow: ground.

Is the new light designed to work as integrated tail/brake/turn ?
If so, then two of the wires would connect up to the brake light power wire. (And won't have a turn function, of course.)