Depends on the cable you have, if you have something near 20 kwadrant then you can just put it on your distribution block and take an end cable from there.
All your amps require a remote, so just put the remote from your HU on a distribution block and connects from there to your amps
HU sets are personal however I also have HP/LP on my HU which I dont use... I have two amps for HP with the only difference in frequenty (more high @ front speakers and "more" low on the rear speakers)...
Humanity my mirror,
Madness what I see