one parameter that swaps values for two different datasets.

[TMason]

Hi, hope someone can help with this because I'm very stuck.

I have two different tables that pull from two entirely different datasets. For various reasons I can't combine the two datasets into one. However they do have some similarities between them.
Both Tables have Lead Source, Department & Manager.

I've been using parameters to allow my report users to change the visual so that they can view the number of sales by Lead source, department or manager as they require. 

Currently, I have a different parameter as a slicer for each table. image below (please forgive my bad paint job! I'm a data analyst not a graphic designer)

I would like to have a single parameter as a slicer that controls both visuals. Can you help?
What I have

What I want

[Data-estDog · Accepted solution]

This is achievable. You need to build 3 common dimensions: LeadSource, Manager, and Department.

Common Dimension = Dimension used by multiple data sets, typically fact tables. 
Follow this video: Fact & Dimension tables in Power BI | Data Modelling - YouTube

After you get your 3 dimensions and link them, it looks like you know the rest with the field params. 

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