I don't have this camera, but on my lf camera the polaroid holder just slides under the ground glass, like a sheet film holder. it's not necessary to take away the ground glass. it's a bit tricky because it's thicker than a sheet film holder, but the springs are wide enough. I don't know if this makes a difference but it's worth a try.
Thanks but this not possible with the Graflok back that's on my camera.