[hpsdr] CW Keying Hermes -- CAT?

[John]

Six meters was open here last night and the CW operation on the new 
code is very nice.  I am using a keyer based on the Winkey chip and 
the output of the keyer is plugged directly into the CW jack on Hermes.

Is there a way to send CW without using the key jack on Hermes?

If so, where do I look for information on how to set it up.  I 
already have VAC working for JT65.

John,  WoGN