VBA embed object/file into specific column of excel

I have a piece of code (code is not mine) for embedding file into a specific column, but i couldn't figure out a way to modify as i constantly a wrong syntax. I'm trying to make it prompt user to choose a file to embed inside the worksheet. but this code is referring to objects in the workbook path

Private Sub CommandButton2_Click()
Application.ScreenUpdating = False

Dim cell As Range

' loop each cell in column B
For Each cell In Range("B3:B" & Range("B" & Rows.Count).End(xlUp).Row)
     ' make sure the cell is NOT empty before doing any work
     If Not IsEmpty(cell) Then

        ' create and insert a new OleObject based on the path
        Dim ol As OLEObject

        Set ol = ActiveSheet.OLEObjects.Add( _
                                            Filename:=ActiveWorkbook.Path & "\" & cell, _
                                            Link:=True, _
                                            DisplayAsIcon:=True, _
        ' align the OleObject with Column D - (0 rows, 3 columns to the right from column A)
        With ol
            .Top = cell.Offset(0, 3).Top
            .Left = cell.Offset(0, 3).Left
        End With
    End If
Application.ScreenUpdating = True

End Sub

I'm still new VBA programming. I'd be glad if anyone could help me with this situation.