I'm in trouble now. It appears that the underdash kneeepad has to be removed in order to snake the AC wire temp control sensor into the right position relative to the evaporator. I have already screwed up the removal of the kneepad by failing to realize that it is molded into an aluminum box framework, and I can't see how that is secured. At least some of the screws holding that box in place seem to be behind the black plastic AC plenum.
Also, I have no idea how to properly locate wire temp control sensor once I have removed what I have to remove to get the job done. Can anyone help with this?
P.S. It goes without saying that I should have asked these questions BEFORE I started tearing my car apart. Will I never learn?

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Berfinroy in CT
Present vehicles:
1973 300 SEL 4.5
1959 Rolls Royce Silver Cloud I
1959 Ford Thunderbird convertible/430
Past vehicles;
1958 Bentley S 1
1976 ex-Max Hoffman 6.9
1970 300SEL 2.8
1958 Jaguar MK IX
1961 Jaguar MK IX
1963 Jaguar E-type factory special roadster
1948 Plymouth woody
1955 Morgan plus 4
1966 Shelby GT350H Mustang