Does anybody have the manual for an SAE 5000??? If so, could you snap a picture of the hookup diagram and post it? I am only using this with a turntable, not a tape unit.
https://www.hifiengine.com/manual_library/sae/5000a.shtml
You can't connect the turntable directly to the 5000 unless it has a built in phono preamp or you use an external one.
Other options depend on whether the preamp/receiver has a tape monitor loop, processor loop, or preout/amp in.
It could also be connected in between a preamp and amp but that would be the worst option.