What kind of panniers is this tubus rack flange for? I was bolting on my Tubus Nova front rack and noticed that there were bolt holes on the bottom of it, and got to wondering what they are for.  The instructions are mostly in pictures and just show that it is to attach this little flange "for panniers".  I'm mostly familiar with Ortlieb-style panniers that clip on the top and a sideways hook below.  What kind of pannier attachment would use this sort of thing?
This would work with my pannier set. I have Axiom Monsoon panniers with a hook at the bottom that would fit right about there.