Mano,
I put the locking latch on my tour pak. If you have the locking latch on your BSR sissybar it may very.
I installed the right hand locking latch on my tourpak, and kept the blk latch stock on the left side. I was just putting it on for size to see how it would fit and kept the screws on but not torque tight. Next thing I knew the damn locks were on there and I couldn't remove my tourpak.
I had to remove all 4 point attachments, the left hand stock black latch, call a buddy come help to raise my tourpak up as if he was removing the tourpak, take hammer and small piece of wood and bang the lock off. (I had to do this because the chrome latch part was hitting the lip of the black plastic docking part of the right rear connecting part) And not allowing the latch to completely come off the black plastic piece.
I was then able to take off the washer and re install everything back to normal. Now everything is working fine!
I hope this is what you are asking help on. Also, there maybe a easier way to get them off, but this is what I had to do to take them off with the washer installed.
Good Luck
YB