Your looking at the reverse light switch.
Which is shown below on the left hand side of the shift tower.
The VSS sensor is on the back of the transaxle towards the bottom. It sits to the right of the diff housing where the axles go in (looking from underneath the car with the you feet hanging out in front of the car). The sensor looks like a little black box and has wires coming up to a plug. Here is the best pic I have at the moment. If you are looking under the car this is what you would see the speed sensor is on the top of the diff where I have indicated. You can see the VSS sensor just hanging out a little bit in the pic.
