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2scoops0406
Initially you said that you have a contored (sic) double glazed bottom panel. Now taking a guess you mean you have an obsured sealed unit double glazed panel ? If so you obviously cannot cut a hole in it. You will either need to get a suitable made DG unit made up, with a hole in it, although I'm sceptical about this as I've never come across it before, but then again there's probably loads I've never come across before, or you need to replace the panel with a steel reinforced PVCu clad panel, and cut a suitable sized hole in this, again I'm assuming this is a PVCu door. Hope this helps, hope you're around to read it.
Regards.
Regards.