Check to see if they are under a removable cap. The shop manual only indicates to remove a cap and then the nuts. It's hard to say without seeing it in front of you -- perhaps drop by a local shop near you for a little first hand advice, usually for free.
RepairPal Certified shops can diagnose and repair your 2010 Hyundai Genesis. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.