Thanks for Jeff, He installed INNOVV K1 motorcycle camera on his Ninja 300 and shared the solid experience in setup the switched power source with a relay.  I wired in a 30A automotive relay as described in the manual and everything works fine now.  Attached are some new images for future customers that are looking on how to wire it for a Ninja 300.  Comments are inline. Relay pin 86 (white wire) tapped into a switched power wire (red wire) which supplies power to tail light / license plate light with a red/gray posi-tap connector.  Relay pin 30 (blue wire) is tapped into a 30A fuse (red/white wire) from the positive terminal of the battery with the red/gray posi-tap connector. Relay pin 85 (black wire) and black wire from USB converter are tapped into the negative (black/yellow) terminal of the battery with a yellow posi-tap connector.  Relay pin 87 (yellow wire) connected to red wire of USB converter with electrical tape.