Will the Mezzanine Module slot still avaliable, when a Core i3 CPU is installed on S1200BTL motherboard?

Accroding to the specifications, the Intel Server Board S1200BT Family supports both Xeon E3-1200 and Core i3 CPUs.

The ARK shows that Xeon E3 has a max 20 of PCIe lanes and Core i3 has only 16 PCIe lanes:

Here is the block diagram of this motherboard below:

16 PCIe lanes are already used by Slot 4, Slot 5 and Slot 6.

So, what will happen when I install a Core i3 CPU on S1200BTL motherboard?

Will the Mezzanine Module slot still avaliable?

Thanks!