[Arran]

Ad ons like that switch are usually one of the first things that gets fixed if I acquire a new old radio, nine times out of ten they are not wired in correctly, and even if they were I really have no need for them as I have plenty of sets that already have factory phonograph connection points in the back. If you want to see a really sloppy job of one of those, you should see the ones where they hack into the grid cap lead of the first audio tube, like the Stromberg Carlson model 228-H I have, I can imagine nothing but a non stop hum whist the set was on.
Regards
Arran