Cambo lens boards

[RTucker]

I just picked up a Cambo 8x10 camera, and it came with large 8.5"x8.5" lens boards in the box with it
. Bigger than the standard boards. They don't fit this camera, just wondering what they fit?

[cowanw]

https://www.pacificrimcamera.com/rl/00838/00838.pdf
On page 7 of this PDF there is reference to a flat lens board #14/C98, 8 and 9/16th inch square - for use on 5x7 rear standard.
Perhaps there are models, original or cobbled together, that use 5x7 rear standards up front and have bellows to suit.