How can I share something on facebook and hide it from everyone but a certain page?

[J.J_4352]

There's a competition on a venue's page on Facebook and you have to share a picture but I don't want anyone to be able to see it, except for the page I'm sharing it from.. I know how to do this if I was sharing it from a friend's page but since it's a venue I'm sharing it from I don't know how to do it?
Thanks in advance

[Jake]

After you shared that picture, click on the audience generator button (asterisk symbol button just above the picture) and select the audience for that picture.