need some advice on my new pa

[DjFr3ak]

i use to run my mixer into my pioneer home stereo..today i just got 2 active behringer 212a's with trs and xlr input/xlr output...my mixer is rca out. i've never dealt with an actual pa system outside a home stereo...so do i need a patchbay or some unit to run master signal from mixer and distribute it to my 2 new speakers. i want to use my subwoofer as well but that uses that crappy copper speaker cable. help me out guys....cheers