Passing Workbook between two subroutines

Hi,

I have code which imports data from one sheet to another. I name them through the code by the following

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Then

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So I can call each wookbook when required using

DestWB
SrcWB

My question is, how on earth can I use these names in another subroutine. I've been looking for hours and can't get my head around it. I've tried passing it using the blow but it doesn't work. I'm really lost here so any help would be appreciated.

Sub NameOfNewSub(SrcWB as workbook, DestWB as workbook)

'code

end sub

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Option Explicit

'Public DestWB As Workbook
'Public SrcWB As Workbook
Private DestWB As Workbook
Private SrcWB As Workbook

Const Project_Path = "C:\Temp\export.csv"

Sub A_1_ini_procedure()
    Set DestWB = ActiveWorkbook
    Workbooks.OpenText Filename:=Project_Path, Origin:=65001, StartRow:=1, DataType:=xlDelimited, _
            TextQualifier:=xlDoubleQuote, ConsecutiveDelimiter:=False, _
            Tab:=True, Semicolon:=False, Comma:=True, Space:=False, Other:=False, _
            FieldInfo:=Array(Array(1, 1), Array(2, 1), Array(3, 1), Array(4, 1), Array(5, 1), _
            Array(6, 1), Array(7, 1), Array(8, 1), Array(9, 1), Array(10, 1), Array(11, 1), _
            Array(12, 1)), TrailingMinusNumbers:=True
    Set SrcWB = ActiveWorkbook
    
    Call A_2
End Sub

Sub A_2()
    Call A_3(SrcWB, DestWB)
End Sub

Sub A_3(SrcWB As Workbook, DestWB As Workbook)
    'code
    Application.Wait (Now + TimeValue("00:00:01"))
        Windows(DestWB.Name).Activate
        
    Application.Wait (Now + TimeValue("00:00:01"))
        Windows(SrcWB.Name).Activate
        
    Application.Wait (Now + TimeValue("00:00:01"))
        Windows(DestWB.Name).Activate
        
    Application.Wait (Now + TimeValue("00:00:01"))
        Windows(SrcWB.Name).Activate
        
    Application.Wait (Now + TimeValue("00:00:01"))
        Windows(DestWB.Name).Activate
    
    SrcWB.Close SaveChanges:=False
    Set SrcWB = Nothing
End Sub

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