[Elecraft] KPA500 with K3/0 and remote rig

[Art]

Hi all,


Interested in using the KPA500 via remote. K3/0 manual states that a simple mod to the KPAK3AUX cable is needed. 


However, this cable from factory has a molded shell on both ends. Anyone figured out how to access it to make the wiring connection needed?


Thanks.


Art KZ5D