First, spawn a Pod Controller, then link it to the seat using the Pod Controller Tool by right clicking the pod controller first, then the seat or vehicle.

Now, use your Wiring Tool, wire Input: Allow Buttons on the Pod Controller, to Output: Active on the Pod Controller.

Now, if you sit in the seat or vehicle that you linked the pod controller to, you can click on any WireMod Button. Just be aware that triggering buttons will have a range.

Hope that helps :D

*Edit: Grammar

thx man!

Im going to add on to this. Is there a way to control a vehicle, but standing/sitting on it, but with the Sit Anywhere Script? If your confused, a friend gave me a vehicle that doesn use a seat, you use the Sit Anywhere Script addon and if you are sitting on the bike, you can control it. I can show you if you need it and I do really need help.