Found out today why my l/h rear electric window aint working...... the cable is snapped. I have a replacement but I will need to drill out the rivets that hold the motor to the door and bolt it. I am sure this is a common thing done, but what size bolts do I need? Its on an ef Fairmont

a m6 or 1/4" bolt about 12-15mm long with spring washers or nyloc nuts will do the job...