How do I ad my Mr DJ Pbx210combo and other AMP?

I bought a Mr DJ PBX210Combo Pa System cheap... I want to add a Home Amplifier to give my speakers some kick as there is not enough Power to them.... Do I use the AMP that I want to buy to power the speakers or do I use The Combo PA System that I bought. Not sure how to hook it up. I'll paste a link showing what I bought

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This is at Amazon /gp/product/B01A6G6BCS/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

and I was wanting to run this AMP as well for more driving power... Basically in a nut shell, How do I do it?

Rockville-RPM45-Powered-Channel-Amplifier/dp/B01LYVH7YS/ref=sr_1_5?s=musical-instruments&ie=UTF8&qid=1520233610&sr=1-5&keyWords=pa+amplifier

Thanks!