Monk is right. Please do not attempt to jump your battery off of a running car. This needs to be done with the car off. The amount of electricity required to start your <800cc motor won't even affect the car battery, there is no need to have the car running and the extra voltage could do damage.
I, for one, am glad that you asked for help. I live in Michigan and would hate to buy what I expect to be a shiny nice 2007 VFR only to find out the wiring has been fried, and the battery is only good for a few starts.
When I first started I asked plenty of stupid questions, and if I had been missing part of a battery tender I would have been confused, too. I had the fortunate experience of receiving lots of encouragement along the way. Now, if you look through my posts, you'll see I probably answer 20 times as many questions as I ask.
Let me be clear, I am criticizing no one. I know it can be frustrating to try and moderate an open internet forum. I have seen how that can attract people who embody the opposite of what VFRD stands for. Go to a GSX-R or a even a CBR website if you don't believe me. It is because of these policies that VFRD is not only more civil but more open to seemingly stupid questions. I'm willing to bet if this had been asked on a GSX-R forum, there would have been dozens of one word responses (fail, noob, etc.)
This is your best bet, plug one end of the attachment into the powerlet on your bike, and the other end into your battery tender (assuming your battery isn't completely friend by now-which is likely is).
I have bought from Tightwad many times and ALWAYS have a better experience (and usually much, much better prices) than if I had bought something from a big-retailer. I highly recommend www.wiremybike.com