This is a Nikko STA-5010 from goodwill.
hook up your speakers
Select your speakers
set the Tape selector to Source
and then! on the back of the unit change the switch that reads "Pre & Main" to "Connect".
This is very likely the reason it was still there when I got to the store, since I saw at least 2 flippers prowling the aisles.
All Lights work.
This stereo sounds great and I am not sure why it was donated. It is
clean, a little dusty inside, I used deoxit on the volume control before
turning it on so I am not sure if was scratchy. Oh well mine now! I will not be doing any replacing of parts on this unless it develops a problem.