More from an Engineering answer without typing a book. ( which I'm not, but did stay at a Holiday Inn Express a few times )
Caster provides the self-centering effect for the steering, Caster also controls how much of the static weight is transferred as dynamic weight during cornering, Increasing caster makes the front end bite more gives steering more feel and will work the right side tires harder, Decreasing will give less feeling in steering and decreases weight transferred during cornering, you also decrease dynamic weight transfer and the LR will NOT unload as much.
Experienced racers will tell you more like, Big tracks less caster, small tracks more, High bite track less caster, lower bite more caster, close split more weight transfer, open split up more less weight transfer. This is based on Oval LTO racing.
As stated for now set it at 7 left 10 right, or 8 & 12 and leave it alone.
Good Luck !!