Power Query - Excel.CurrentWorkbook

Hi

I currently have the M code below that queries a Workbook called Budget.xlsm. I want to change that to query the workbook that the query sits in - for instance Book1.xlsm

I guess I will use the M Code Excel.CurrentWorkbook but I don't know how to replace the File.Contents portion of the Code if I was to use Excel.CurrentWorkbook.

Can someone advise how I would change eth code to refer to the current workbook?

Allister

let
    Source = Excel.Workbook(File.Contents("S:\Budget.xlsm"), null, true),
    #"Filtered Rows3" = Table.SelectRows(Source, each ([Kind] = "Sheet")),
    #"Filtered Rows1" = Table.SelectRows(#"Filtered Rows3", each Text.StartsWith([Name], "bd")),
    #"Expanded Data" = Table.ExpandTableColumn(#"Filtered Rows1", "Data", {"Column1", "Column2", "Column3"})
   
in
    #"Expanded Data"