[Elecraft] KAT500 connections for Yaesu FTdx1200

[Amateur Radio Operator N5GE]

I use an FTdx1200 for MARS message traffic because my K3 cannot
transmit on the MARS frequencies in some parts of the HF spectrum due
to the K3's IF frequencies and I like my KAT500 very much, so I  am
thinking about using an additional KAT500 as the tuner for the Yaesu
Rig.

If there is someone out there using that combination I'd like to know
how it's working out and how the connections were made.

Thanks for any feed back or comments regarding above,

Amateur Radio Operator 
N5GE