[Elecraft] Connecting P3 to a K3

[Richard Thorne]

I just ordered a P3.

I believe I need to order the y cable as well but I'm not sure.

I've down loaded the manual and I can't find the wiring diagram between 
the P3 and K3, specifically the nice picture of the back of the units 
showing how everything is connected.

I am already using one y cable so my Microham keyer and KAT-500 can 
share the accessory jack.  I'm also already using the RS-232 port for my 
Microham keyer.

Do I need another Y cable?

Thanks in advance.

Rich - N5ZC