STEP 4:
Now add the lower camera platform rods and assembly to the square
front rail. This should be slightly to the left of the main rods as can be
seen in the pictures below. Start by inserting one of the short stainless
steel rods into the square front rail so that the safety stop screw is at the
top.
Next take the lower camera platform assembly and insert the remaining
short stainless steel rod into this as shown in the picture below. The
safety stop screw (arrowed) will be at the bottom of the assembly.
Tighten the two gold locking tabs to secure the rod in position, the other
two tabs should be loose.