Gymrex GR-MG 51 Manual De Instrucciones página 21

a) Seat the stabilising fastener (3) between the side frames (1, 2). Apply the
365x60 reinforcing plate (7) on the outside of the right frame (1). Align the axes
of the fastener, frames and plate holes. Fix the structures with M12x80 screws,
M12 washers and M12 nuts. Slide the washer onto the fixing screw. Move it
from the outside of the frame through the hole axes. Attach with a washer and
nut from the inside.
The left frame (2) with the fastener (3) is installed in the same way.
b) Fix the main frame (4) to the lower stabilising fastener (3). For this purpose,
align the axes of the main frame and connector holes at the connection point.
Apply the 180x50 reinforcing plate (6) on the outside. Attach the upper fastener
using M12x80 screws, M12 washers and M12 nuts. Slide the washer onto the
fixing screw. Move it from the outside of the frame through the hole axes.
Attach with a washer and nut from the inside. Attach the lower fastener using
M12x70 screws, M12 washers and M12 nuts. The fixing procedure is as above.