I think she mentioned in another post she had a USB keyboard Bat as she said it had 2 USB ports on it but recommended she only used one
The one next to your mouse Lona will be the one for your keyboard if you werent using a USB one.
The two next to your speaker should be MIC, it should have a litle picture of a microphone and the other will be LINE IN ,if you are lucky.Sometimes instead of printed words or pictures they have symbols such as a circle with arrows pointing in or out,can you see anything like that?
Are there any colours on the sockets Lona mine has pink for mic,green for speakers and blue for line out?
My speaker socket is next to the joystick port,next is line out then last is mic in