Please do not put the locks into the holes in the bag latch mechanism! If you happened to do this you will have to see if someone else can help you get them out as I don't know how.
The way I did it was to insert my ignition key into the locks supplied with the bags. Next lightly file the "tabs" that remain outside the cylinder flush with the outside surface. Finally I would insert the ignition key multiple times to make sure the key would actuate tthe tabs smoothly. Minor polishing may be necessary to make the tabs move freely.
Next clean all filings off the cylinder and lube the cylinder. Insert the cylinder into the bag as directed in the provided instructions. Repeat for the other side.
Some simular directions on the old style cylinder are posted on Pirates web site I think.
Old thread revived by spamming bot, but thought i would give any future readers some help.
The described method with filing the tabs is NOT how to do it, first things first.
Do not buy locked panniers that do not have a key supplied with them....if you do you will have to break in to the pannier. If you buy unlocked and opened panniers the lockcylinders must be removed with the key they are coded for, otherwise you will still have to break stuff to get them out.
Unlock and open the pannier and leave key in place, use whatever screwdriver needed to dismantle the lock mechanism, now depress the locktab on the cylinder that is farthest away from the key, now the lockcylinder with key in it can be taken out.
Slowly remove key whilst holding the locktabs with your fingers (do not just yank the key out, the tabs are springloaded and all the parts are SMALL).
Take your bike's ignitionkey and follow this video on how to rearrange the tabs to fit your key.