I have been lurking here for a while, and it is time to give something back. It has annoyed me that the battery on this bike is so small. I have had to charge too often when i have been doing a lot of starting and stopping. And the cumbersome system to have to remove the seat for access to the battery had to be dealt with. I decided it was time to add an external charging port. I ordered two SAE connectors with a short cable. This is how I did it. First I put an extra layer of heat shink hose on the cable to give it a little extra protection against wear, then I added ring connectors to the cable ends. IMPORTANT NOTE: Connect the RED wire to the NEGATIVE Side of the battery! Othervise the exposed end of the SAE connector can touch the frame when the end cap is taken off! NOT GOOD.... I secured the cable and connector with a ziptie to an existing cable bundle and it now hangs out at the rear of the left side cover. SAE cable #2 i soldered to the battery clamps on the charger. IMPORTANT AGAIN: This time, connect the red wire to the red positive clamp, and the Black wire to the Black negative clamp. Pictures of the process below. Hope this can be of use for someone.