Not Sure why a Mech mod can't have a wire in it? Maybe someone can Chime in on this?
All I'm trying to get at here is if there are Hurdles to overcome with a Design that has the Battery Positive End Pointing away from the User, and there is an Easier Way to Vent a mod keeping things the Way they are, why aren't All OEM Putting Vent Holes on at the Positive end of Mech mods?
My thought is ... They just don't care ... simple as that