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Easy, guys. I think that the photographs are from JDM one-piece coupe units for the Legend. MikeD states that the link refers to the procedure for a Lexus.
Now as to why there would be a "drain tube" on the upper portion of a headlight space, I believe it would not be a "drain" until condensation built up in it and it then drained into the engine compartment. It might be more appropriately termed a "vapor drain" that equilibrates the humidity in the headlight assembly with that in the atmosphere.
Those with more insight, please correct me!
Now as to why there would be a "drain tube" on the upper portion of a headlight space, I believe it would not be a "drain" until condensation built up in it and it then drained into the engine compartment. It might be more appropriately termed a "vapor drain" that equilibrates the humidity in the headlight assembly with that in the atmosphere.
Those with more insight, please correct me!
