JMR electronic Fortra 5251F6 - Manual (Page 25)

2. Affix the extension bracket to
the rear of the unit using two
#10-32 screws. There are 3
holes in the extension bracket
for mounting. Depending on the
hole pattern that is being used in
the cabinet, two holes should
always be available for securing
the extension bracket.
3. The fronts of the rails
have three holes. Two of
the holes (top and
bottom) are used to
secure the rail to the
cabinet. The middle
hole is used to secure the
enclosure to the rail and
cabinet. Secure the front
of each rail to the
cabinet vertical rails
using two #10-32 screws
for each rail.
7-3
FORTRA
 15-bay I6 Infortrend 5251F6 Installation Guide Rev A
Extension Bracket