As the title says, I know how to use an Associative Bore token to go from an edge to a face 5/6, but is there a way to go the other way around?

What I want is to have an associative dowel on the back of our shadow rails that would automatically put the edge bore on the left and right sides of the cabinet.

I could add these tokens to the sides instead and do some library designing to filter out whether or not the cabinet is using shadow rails to add an edge token, but I feel it would be easier if I can just write a token on the shadow rail part instead.