Well, that still appears to be a 2ch amp with just a pair of speaker terminals. I do see this section in the manual for connecting speakers:
Attach desired speakers
Your speakers’ power rating should be at least 125W for 8 ohm speakers, and at least 200W for 4 ohm speakers. Do not connect speakers rated at less than 4 ohm.
Note:Amp can drive speakers with nominal impedance above 4 ohms. Two pairs of 8 ohm speakers wired in parallel are also supported. Don’t wire your speakers in series because it will result in poor sound quality.
- Remove the cap from the banana plug to reveal the connection hole.
- Insert the stripped end of the speaker wire into the hole, then return the cap to the banana plug to secure the connection.
- Note:Connect the red (+) and black (-) terminals from each speaker to the corresponding banana plug and terminal on Amp. Mismatching of polarities will result in weak central sound and a distorted sense of sound direction.
- Insert the banana plug into the proper speaker terminal on the back of Amp.
- Repeat to install the other speaker wires.
While it is stupid to say that the speakers power rating should be at least 125W/200W (it's like they don't know how it works....). If you do connect four speakers in parallel they are only recommending 8 ohm impedance speakers....which the speakers you linked are rated at, so should be okay (altho many speakers can dip well below their stated nominal impedance....impedance varies with the frequency being reproduced).
Mono is where all the audio information is in one channel--monophonic. A 2ch stereo signal has slightly different information in each channel. Your amp seems to have a mono mode so no problem.