How to find the cubes linked to a Planning area ?

Hi Experts,

Can any of you let me know the way to find the cubes that are linked to a planning area. To be clear I want to find the from which all cubes data is coming to the planning area. Is ther some standard table which gives me this ?

Also it would be very helpful if I can directly find from which all source systems data comes for the planning area ??

Thanks in advance

Regards

Ashwin