hello guys i came here for knowledge
a friend give me this amplifiers for free.

can any one tell me how can i connect this to my current setup to make it work like a power amps.
source:minix neo x8-h plus
receiver:Denon AVR 2700
speakers:JBL Northridge (E90 L,R) (E30 RL,RR) (EC35 center.
internal Tweeter die replaced with external Tweeter Pyramid TW28)
Sub woofer: H-100 Premier Acoustic PA-120
power amplifier:hafler 500 for L,R front
i want connect one of this amplifiers to my center channel from the pre-output center of the receiver.
later on i want to upgrade my receiver since this one don't have any pre-output for rear L&R.
or there is any way to jump speaker wires to this amplifiers ?
i have read a little bit of the manuals but i am not sure if this amplifiers is going to work independents channels like stereo for the rear speakers
I use this setup mostly for movies.
any help will be very appreciated thank you