Are you wanting two monitors with different mixes or two monitors getting the same mix? The XR696 only has one monitor output, an unbalanced 1/4" jack labeled "Line Output" and "Monitor", so you would be limited to both monitors getting the same mix.
To do that, run a 1/4" TS (Tip/Sleeve) unbalanced cable from the mixer "Monitor" line output to the "Input 1 - Line" 1/4" input on the amp. Set the switches on the back of the amp to have the "Amp Mode" set to mono, "Clip Limit" set to On and "Subsonic Filter" set to On. Connect one monitor to the Channel 1 output and the other to the Channel 2 output. They should then both get the Monitor send from the Peavey mixer.
Note that because the connection between the mixer and amplifier is unbalanced, you will want to keep it as short as possible. You probably want to avoid having the mixer at FOH with a long cable from there to the amp on stage. While it is not ideal, this is one situation where you may be better served to keep the amplifier at FOH and use long speaker cables.