John is most certainly correct... one axle is leading while one is trailing, so it's in the way the hull holes were enlarged. I punch mine out with a drill press, lining up the center of the hole. Drilling by hand, the bit will 'wonder' to one side and un-evenly increase the inside diameter of the existing hole.
I have quite of few of these braces installed in various tanks... the same MO applies even with different tanks as I did with the Panther and now the Jagdpanther.