[Elecraft] K-Line connections question

[Graziano Roccon]

Ciao,
i own a K3s with P3 panadpter.
I would like to have a KPA500 and a KAT500 (here in Italy more a dream that reality, very hard to find).

I am wondering if is possibile connect TOGHETER in some way and have all working as planned:

- K3s
- P3
- KPA500
- KAT500
- Computer connection for CAT control

without re-work the connections for firmware upgrade, ecc.

Thanks in advance, Graziano IW2NOY