what is my data source when useing single situal data model

[pbiideas1]

I made a report that links to a data model(another power BI repport) but as fare as i can tell, there is is no way to see withc model it links to. - the whole Data part of the ribbon i greyed out. I have 3 similar data models (yes stuid me) but withc one is the source ? - make a button not greyed out so you can see that