Q on connecting Benchmark DAC3HGC to AHB2

So I finally got my components for my setup, im a newbie and don’t want to fry anything and out of the gate I’m lost.

my setup consists of :

Benchmark AHB2

Benchmark DAC3 HGC

Totem 1 bookshelf  speakers

 Cambridge Audio Azur 840C CD player

Bluesound Node

For now I’m just impatient and curious to get sound, so I will hook up the CD player first as I know I will have some head wrecking setting up the Node.

So, to get the DAC3 connected to the amp I have a left and a right socket on the DAC. On the amp there is no “left” or “right”, only “2 in” and “1 in/mono in”, so not sure which of these the left and the right DAC should plug into.

This should be very basic but I don’t want to damage anything.

Next, on the CD player I’m guessing I use an RCA type cable to plug into the digital outs (SP Dif, coaxial)? If so would that cable then plug into the “D3 or D4” input socket on the DAC?

Sorry to be so naive but I have read the manuals but no mention as I guess they assume everybody isn’t as stupid as me.

cheers