Which bolts and nuts to use to install Osymetric chainrings to replace Shimano Ultegra R8000 chainrings?

I would like to install 52-38 Osymetric chainrings instead of my 52-36 Shimano Ultegra R8000 ones.

I’ve bought the Osymetric chainrings and tried to install them, but I realised I need bolts and nuts to install them (rookie mistake!). That’s because the Shimano Ultegra R8000 comes with integrated nuts, therefore I cannot use them.

And now I’m not sure about which bolts and nuts to buy:

• Those fancy ones but according to Shimano’s documentation, it’s only for 46-36T chainrings (from Shimano I assume?): https://www.sjscycles.co.uk/chainsets/shimano-ultegra-fcr8000-gear-fixing-bolt-nut-set-m8-x-101mm-y1w898090/
  That would be nice that they fit, because like that the design of the crank will follow.
• Those normal ones: http://shop.osymetricusa.com/CHAINRING-BOLT-KIT-ROAD_p_46.html
• Other ones?

The documentation by Shimano about the R8000 chainrings: https://si.shimano.com/pdfs/ev/EV-FC-R8000-4256.pdf

How can I know bolts and nuts will fit on my Osymetric chainrings? Will the fancy ones by Shimano fit on my Osymetric chainrings?

Thanks for your help!