Under the Go to Related Records options there is a tickbox under the layout select to 'Use external table's layout's', tick this and then go back to the list of layouts and you will see layouts from the source file of the table of date.
I hope this helps.
I cannot choose it, it is grayed out.... What should I do to be able to choose it?
I found it!!! I needed to add a new table occurrence to the relationship graphs (from the other file).