How do you install an accelerometer in a tablet?

I've been modding my laptop into a tablet pc, which is fairly simple and straightforward, but every guide I find that claims to teach you how to add an accelerometer in order to rotate your screen orientation when you physically rotate the tablet only shows the software part, but nobody has even attempted to explain how or even IF you have to physically INSTALL the accelerometer. I would ume you have to fit the accelerometer into the computer in order to utilize it's features, but I'm not sure, and I'm not looking to tape a controller to the back of my tablet. For anyone who actually has done this or knows what it's about, do you have to physically stick the accelerometer in the tablet, or do you trick the software into rotating the screen orientation even though you don't really have a special tool for it?