Streaming Music To An Old Receiver

I have a question about how to hook up a NAD C658 to an Akai AA-R30 receiver.

I’m using the NAD to stream music in my garage. Connection is single ended RCA’s. Does it matter what input I use on the Akai?

I have it hooked to Aux input now.

The Akai manual states the Aux input connection is for relatively high output components such as a ceramic or crystal type cartridge turntable or a tape deck or recorder.

Would it be better to use a Tape1 or Tape2 input with a connection to the play inputs?