Gen 1 Hayabusa 99-07 Gear Position Indicator Speed Sensor/Crank Position Sensor Connections Video.

This is the way I connected the Gear Position Indicator wiring on my Gen 1 Hayabusa 1999.
GPi White 3 pole connectors go to speed sensor 3 pole connectors creating a 'loop' through the GPi circuit.
The single green wire from the GPi is soldered into the white wire on the Crank Position Sensor wiring on the harness side of the connector.
The GPi is from AliExpress.