Tesla Motors Club

So, I just bought my first Tesla and knew I needed a wall connector. Here's the issue - I don't have a garage. So, I had an electrician install it just on the corner of my house, and this process was not cheap. Unfortunately, before he installed it, we forgot to check whether the cable was long enough to reach the back of my vehicle. And, it is, SORT OF. I have to pull up within 6 inches of my house, and back and forth it, so that I'm at the very outside corner of my driveway (aka not something I'll be doing after a glass of wine) and then stretch the 18' cable to capacity, and it'll just reach the charging port. Of course, I could back into my driveway, but it's on a very steep hill, and that's just as nerve-wracking.

Here's my question - is there any way to lengthen the cable on the wall connector?