Need help deciding where to mount 4 of my Aurasound bass shakers (transducers) on my sim, help!

[mpmo]

Here’s my rig (dofreality P3) https://imgur.com/gallery/7GzUEeT

These are the options, which is the best in order to simulate a chassis mode with two front and two rear wheels?

1- two below the pedals (front wheels), and two under the seat (rear wheels)

2-two below the pedals (front wheels), and two behind the seat (rear wheels)

3-two on the side of the seat (front wheels) and two on the back of the seat (rear wheels). Like this http://www.alvarezeninternet.com/temp/mdfcockpit09.jpg

4-extensions mode with one at the back of the seat, two under the seat, and one under the pedals

First three being chassis mode where each shaker simulates a specific wheel