[Elecraft] K3: RS232 port and Rig control

[Kenneth Waites]

How to connecct all I need to connect ot the RS232 port is perplexing to me.
 
I need it for:
Stepir antenna tracking - on a y cable
Rig Expert digital modes interface for MIXW - on a y cable
K3 Utility interface (disconnect everything else)
Rig Control Program/Logging program.  This leaves me bound to MIXW.
 
I use a Y cable to interface to Steppir and MIXW.  Putting more Y cables creates a rats nest behind the K3, and there could be confilicts on a wire.
 
I feel kinda stuck.
 
Ken