I could TOUCH that connector, barely, with the tip of one finger, but I sure couldn't undo it.
In the end, I took off the seat, reached in behind the tupperware (to the left of the fuel cap tray) with a bent piece of stiff wire, and worked the connector backwards to the rear edge of the false tank plastic where I could reach it.
To avoid the problems with trying to connect the wire from the new alternator in this position (with the connector in this position, the wire would be too short - in its original position it's long enough, but then I couldn't use the connector - a 'catch-22') I cut most of the wire (including the OEM connector) from my old alternator, plugged the connector back into the other half, by the fuel cap tray, then dropped the cut end of the wire down to where the new alternator was going to go. I bared the end of the wire & crimped on a small female spade connector. Inside the "sense" wire connector from the new alternator is a small male spade connector. Plug the two of 'em together, and you're good to go. Basically, just made an 8" or 9" extension cord for the "sense" wire. As this wire doesn't carry any current to speak of, the extra length is not an issue.