what slots can you use for SLI 2way?

Hello,
 
you will use slots 1 and 2 for 2 way SLI

So you can't use slot 1 and 3?

SLI requires at minimum an x8 lane. The 3rd and 4th PCIE lane on your motherboard is a x4 lane which would not support SLI.
 
 

So what lanes are the 3rd and 4th for?

CDH450
So what lanes are the 3rd and 4th for?

Any PCIE cards you wish. They can even be used for more graphics cards albeit not for SLI specifically.

So I have my MB drivers installed, nivida control panel updated, and geforece experience updated and I do not have the option for SLI???

You should have..If you have an add-in card in the PE3 slot, it will drop the PE2 slot down into x4 Mode and break SLI which needs slots to run in at least x8 Mode as stated by MDecker..Take out the other add-in card if you have any installed..See page 12 of the mobo manual for PCIe slot breakdown.