Speed pulse sensor? Reverse light wire?

[Chills]

The new head unit I'm installing needs to be connected to the speed pulse wire and the reverse light wire. It's a nav system and the input from each will help the system determine where the car is more accurately (in case you were wondering).

So my questions are:

1. Where is the speed pulse wire?

2. How would I run the reverse light wire to the back bulbs? My main concern is how to get it through the engine compartment.

Any pictures would be GREATLY appreciated.

2002 Boxster S.

Thanks!!