secret mission mata hai and the kaisers submarines

stuck in the green room major williams cannot find what it is that i have to place on the bridge,i have a map of europe , have not found the piece of paper ,no things to use on the chess board, old but i love these games get very frustrated.
regards wartie

Hi Wartie- welcome to the forums!

You have to place a small statue-like object on the bridge, similar to the one that's already there.

finished long ago thanks for any help wartie