Hi Jordan.
Is it possible you are dealing with an Early/Late design change?
If you look at your Magazine Rack, there are slots for three Bren Mags forward of the seat hanger slot and four mags aft.
In the drawing from the manual, there are four mags fore and aft of the two seat hangers.
The drawing suggests an open storage bin under the front of the seat between the mag racks. Your assembly seems to have been modified with two wooden runners or guides to hold or support something. This ‘something’ appears to be more important/valuable than the items stowed in the drawing, thereby requiring a locking cover.
Interesting mystery.
David
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