This greatly assists in accurately positioning the mounting brackets 1A, 1B on the mounting surface 101 and to ensure that these are properly aligned before {HEAD ~ fasteners} are mounted to {TAIL ~ the holes} 7 
This greatly assists in accurately positioning the mounting brackets 1A , 1B on the mounting surface 101 and to ensure that these are properly aligned before { HEAD ~ fasteners } are mounted to { TAIL ~ the holes } 7
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH