The head cover is hinged at the back. Flip it up. There is a mechanical switch above the 2 play heads. It should be to the left for 1/2 track play. One of your pictures shows an owners manual. have you bothered to read it?
If only I could read! The picture shows the cover to the manual. The manual itself I do not have.
I really do appreciate your help but if it's so big a pita to give me some advice, why not NOT respond rather than get pissy with me and assume I wouldn't just read the manual first?