If a JOF member can't address your specific question, you may want to contact the window manufacture directly.
The lower corner of the window will have the manufacture's name..., either Lippert Components (LCI) or Cleer Vision Windows.
Bob
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2016 GM 2500HD 6.0L/4.10
2018 Jay Flight 24RBS
2002 GM 2500HD 6.0L/4:10 (retired)
2005 Jayco Eagle 278FBS (retired)
1999 Jayco Eagle 246FB (retired)
Reese HP Dual Cam (Strait-Line)