Simulation of bolted joint

Hello all

could anyone explain boundary conditions to represent bolts. I want to simulate housing conncected to vehicle frame with 4 bolts. vehicle frame geometry is not available. wnats to design size of bolts and forces on bolt .

there are different Options available , Fixing cylindrical holes in all directions , using fixed hinge Options ... wants to know most correct Option

thanks in advance

SolidworksSimulation