[Elecraft] KX3 with a KPA500

[AC6JA at aol.com]

I currently have my K3 hooked up to the KPA500 and KAT500 using the  
optional band data cable.
What would be the cleanest way to be able to hook up the KX3 to the  
KPA500/KAT500 with the least amount of cable swapping?
Obviously I would need a coax switch to switch the RF input from the K3 to  
the KX3.
I'm curious about the ALC and PTT lines?  What can be left  connected?
Has anybody tried this setup yet?
Let me know.
Thanks.
 
Mike  AC6JA