IMO, just return the cooler to the store and have it replaced by a cooler that is compatible with LGA2011. Ask them which ones are compatible or just bring the mobo with you and have them mount it for you. (Not sure if this is possible in the US, over here they will do that as after sales support.)
Don't get a mounting kit for another cooler. Ways to mount a cooler varies by manufacturer, their only requirement is that it be compatible with Intel''s socket. So all those mounting kits won't work on your cooler.
I tried a stab at the manual. See if you can do just steps 5,6 and 8. fastening the spring loaded screws to the mobo holes directly instead of to the screws that are on the unused steps.
Don't get a mounting kit for another cooler. Ways to mount a cooler varies by manufacturer, their only requirement is that it be compatible with Intel''s socket. So all those mounting kits won't work on your cooler.
I tried a stab at the manual. See if you can do just steps 5,6 and 8. fastening the spring loaded screws to the mobo holes directly instead of to the screws that are on the unused steps.


















