it's easy on a Gen2. Take the screen off and cut the tie wraps. Also then easy (optionally) to take the screen mechanisme off, then gently pull on the cable to see which one it is. The connector is on the LH side under the frame, well below the horn. It also has two tie-wraps, one around the connector, and another one on the cable. I disconnected it for other reasons but did not remove the side panels.
You can position the bar on the lower screen mechanisme screws, about 50mm lower in line with the angle of the screen, but you have to cut off a bit of the not used bosses in between, and have to bend the bar a tiny bit. The bosses are in my none expert opinion for a cover on the 900XR, same part is used
And yes, I've also not yet found a practical use for that storage area