I wanted a second USB point on my 2018 California Sidecar Trike. I used the Honda USB cord which plugs in and is intended to be ran to the left saddlebag. Since I don't have saddlebags I decided to run the cord to the top trunk on the Trike. I removed the seat and then removed the panel just above the radio/electronic module. I bored a hole big enough to pass the cords through which I supported with a grommet cut to size.
I also added a cigarette lighter plug in the trunk which I ran to the accessory point on the fuse block using a fused cable. I chose a cigarette lighter plug because there are so adaptors which will work with the plug. I have included a photo of the connections and another of the adaptors I will be using. I ran the cable to the fuse block in a black colored sheath which matches the Honda OEM wiring allowing it to blend in with the other wires and cables.
Bill