CUBESET in Excel referencing multiple dimensions

Many thanks for your valuable tips. I've seen the stackoverflow page before but couldn't get that to work for me and to solve it using my underlying Power BI Desktop Pro Model (pbix) would be an alternative but this time I need the solution directly build in Excel by using the CUBESET function.

After some more testing today and by looking into TopCount for SQL Server 2019 I was surprised when I got the below to actually work in Excel:

=CUBESET(MyCube;"{[Actualities].[Actuality].[All].[AC]*([Company_Group].[Company_Code].[All].[2053]*[Customer].[Customer_Name].members)}";"CustSet";2;"[Measures].[Amount_YTD]")

Using * and () around company_code and customer_name, somehow solved it but I'm unsure why?

Trying to also add a 3rd dimension I have like: [Currency].&[LC] failed when trying to place it in with * and some testing with ()s.

/Johan