there is one of these on the insp cover
the way you look at the cover from the front towards the rear of the vehicle is located on the top right (driver's side) of the insp cover.
i have no idea what kind of bolt this is
the 2 bolts on the bottom are M12 (metric 12) and about 2-3/4'' long (or even 2-1/2), if you miss those you can use 1/2'' bolts no problem.