How do I connect my emotiva mc700 surround sound proc to preamp

Connect the emotiva mc700 LF and RF outputs to esoteric c03 RCA 3/Signal-Thru inputs.
On the esoteric c03 setup menu configure the RCA3 input to SIGNAL THRU.

https://www.manualslib.com/manual/532689/Teac-Esoteric-C-03.html?page=11#manual

Thank you. So.if I don’t use the THRU option then I can use the preamps volume control as the master volume control ?

Whats the difference between using THRU and normal?

Whats the difference between using THRU and normal?

If the RCA3 is in normal mode, the preamp volume control still active.
When RCA3 in signal thru mode, the preamp volume control will be disabled, you will using the emotiva mc700 to control volume.

So.if I don’t use the THRU option then I can use the preamps volume control as the master volume control ?

No, it only control the front channels volume, the rest of channels still need to use the emotiva mc700 to control volume.
Using the pass thru option and let the emotiva mc700 volume control as the master volume control is the best way to setup home theater system. 

Wouldn't it be simpler to have just one volume control vs 2..

Sorry, I just revised my response.