Connect an XLR cable from "Out A" on the mixer to "In R" on the equalizer. Connect a second XLR cable from "Out B" on the mixer to "In L" on the equalizer. This is a line-level signal, so regular microphone-quality XLR cables can be used.
Connect an XLR cable from "Out R" on the equalizer to the right channel input on the power amplifier. Repeat this process with "Out L" on the equalizer to the left channel input on the amp. It is possible the power amp will require an adapter, but most professional amps accept XLR inputs.
Power up the mixer and equalizer first, before turning on the amplifier, to prevent loud switching pops from being heard.