Technics SC-CH750 Operating Instructions Manual page 37

errr)
(Step 4 also available from the remote control)
The cassette holder will automatically close.
(Auto tape selector function)
2 Press REVERSE MODE.
Each time you press, one of the reverse modes' indicator will
light to show which mode you select.
DECKI2
>: The forward side (front side) will play.
<1: The reverse side will play.
The display indicates which tape is playing.