Problem solved!
One of the connections was lost as you can see in the picture. I tried to solder the wire to the remaining material, which was successful. However, the switch itself is also defective. Which means I could measure about 30 Ohms while pushing the brake inside the car ( I’m extremely flexible ) , so replacement is needed. I ordered a new one which I hope to receive this week.
The thread, at least in my 1970 TC, is 3/8 X 24 UNF.
The problem with new Lucas ones, in green boxes, is that they usually last only a few months. Perhaps if you can wire in a relay, you will help the switch live for longer.
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