Server Motherboard and standoff holes not lining up

[ChaosJ]

So I have a dual socket 2011 e-atx/ssi eeb mobo from intel and am using it with a phanteks enthooo primo. but, there are no holes for the top standoffs. while the ones on the bottom line up fine, i managed the get the top right to just about fit, bit there are no more holes or standoffs that line up despite the case supposedly being compatible.

 

I dont think the mobo is supposed to hold steady just on the sturdy ness of the IO plate on the left and a single mounting screw on the right corner. is there any fix that doesnt involve drilling a hole into the case? i dont own a drill. I do however have plenty of mounting screws and the plastic tabs. as well as standoffs. 

 

do help