That cardboard cover does not go between the grill and the speaker. It is a solid cardboard dust-cover to go over the top of the speaker, between the speaker mounting-frame and the rear of the radio cabinet.

I am out of town, if no one posts a photo/illustration, I will post a photo in the new year.

added later: Jim Carter photo and information about the cardboard speaker cover.

Last edited by tclederman; 12/22/2013 11:16 PM. Reason: link to Jim Carter info