A few weeks ago, I had to park my TC and trailer on a country road for a while. Despite the lack of traffic in that neighbourhood, I turned on my 4-way flashers, and when I tried to start the engine 3 hours later, I found the battery was dead. I called a friend to come give me a boost, and discovered that even when you remove the battery cover, you can only really access the positive battery post to clamp on. There isn't enough space above the battery to clamp on to the negative post. After some fumbling, we finally got a ground somewhere, but I was a little frustrated by the whole thing. Later on, back home, I found the solution: there is a short length of wire between the negative battery post and an external post on the body, just above the fuse box, and to the right of the battery when looking at it. (It really is on the left side of the car.) That seems to be the best place for the negative clamp.