This is what I love about this system you can really do most anything you want without bending or breaking the RAW.
Except in this case I'd ignore the RAW and treat the Wrist Mounts as always drawn, since effectively that's what they are , whereas with your RAW a PC still has to use a Maneuver to draw a second Wrist Mounted weapon or even a hand held weapon (Quick Draw only works once per round).