connection audio options

hi can someone tell me what audio options I have available to me ..please

i have maschine mk2
komplete kontrol s49
traktor s4
pair of active mointor speakers
and komplete audio 6
apple imac 10.13.6 high sirrea


as I understand. I connect Maschine mk2 direct via USB to my iMac
i connet komplete kontrol s49 direct via usb to my imac
sound is routed through my iMac to my machine's soundcard and outputted via that ........correct?

if I want to use headphones on my Komplete Kontrol s49 I will have to plug outputs from my Maschine into complete audio 6 ... correct?
this means running two 1/4 inch balanced leads from machine to komplete audio 6 and then two 1/4 leads again to my monitor speakers?

if I want to use my s4 Traktor with everything connected
i connect directly via USB to my iMac
i connect out audio leads from tractor to komplete audio 6...

so there USB connections to a computer device
and four connections 1/4 leads to output devives

I want full connectivity.

please correct where wrong .thankyou