Do you have a soldering iron? If you get some desolderting braid, you might be able to draw out the solder in the holes. Unfortunately, the opening may not completely clear and it could still not fit the jumper. If that doesn't work, then you could heat up the hole with the soldering iron while trying to push the jumper in there. As the remaining solder melts, you should be able to get the jumper in there. Of course, this may permanently solder your jumper in there. Hopefully that is OK with you.
Moog stuff: Slim Phatty, Minitaur, Werkstatt x2, MF-103, MF-104M, MF Chorus
Running Moog software on Win7 64-bit
Dreams of a Voyager XL some day...