hifi engine

Teac A-4010 SL speaker setup

I was recently given the above tape player. I did have a sony many years ago and have many tapes so I thought I would accept this one and be back into the music. So, I am having trouble obtaining any sound from a speaker! The VU meter is telling me that it is picking up the sounds on the tape but there isn't any sound from a single speaker. the back of the tape player just shows a red and white ge plug for 'line out'.
given that, could someone please tell me what to do with just two line out female plugs. I know it may sound basic but it would be very helpful to me.

thank you,