Reattaching a pad on my Suttner

[bill_mchale]

Hi, 

Use to be rather active on here, but young kids make free time scarce :).  

 

Anyway, I have a Suttner Concertina that I really enjoy playing, unfortunately the pad for the middle row g/a managed to detach itself from the lever it was mounted to.  Examining the pad, it is almost like it was never glued on in the first place... though I can see the glue (rubber cement?) still on the lever.  So, my question is, what is the best way to fix this?  

 

Thanks for any help.

 

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Bill