Connections to a receiver

[keyboard]

Hello,
My DVD player is connected to the TV with an HDMI cable.
Sometimes I use the DVD to play audio cd's.
The DVD has audio output ports. (Not connected to the TV).
On the receiver there are two connections labeled CD, and two Line-in connections.
On the scheme, the CD player is to connect to the CD ports, and the DVD player is to connect to the Line-in ports.
Now as mentioned above, sometimes I use the DVD player as audio cd's player. Which input connection better to use, the CD connection or the Line-in connection. (Attached part of the scheme)
Answers will be appreciated
Thanks
Motim

[Attachment 58530 - Click to enlarge]

[johns0]

Doesn't matter,just use what connection that's easier to manage.