conecting mutiple compnentes

[Ric27]

I have amassed enough components that I have 4 systems operating. One upstairs, one in the garage and two here in my clubhouse in the basement. I would like to compile the last two together so I could set up the listening space to my best advantage to save space and in general up my listening pleasure. How do I combine all the parts to run in different combinations or all together which would be really cool.

What I have.
Sansui 5000X
NAD 7080

JVC TD V621 cassette deck
Pionier 707 R2R

DBX dx5 CD player

Kenwood KD 2070 TT

4 sets of speakers (two for each reciever)