[Elecraft] K3 Aux RF mod for Rx out (No Sub-Rx)

[Russ]

I would like to split my K3's Rx feed to also feed my new SDRPlay SDR.
One way is to put a splitter (I'd use a mini-circuits ZFSC-2-1W+ or similar) between the KXV3A's Rx In and Rx out ports and suffer the 3 dB loss (which should be insignificant since my ambient noise is far above the K3's Rx noise floor.Another way - I think - since I do not have a Sub-Rx is to make the Aux-RF BNC an output fed off of the cable that normally feeds (the nonexistent in my case) Sub- Rx.  This leaves RX in/Out available for a transverter later on.  BTW - I think this will still incur the 3 dB loss - albeit insignificant
For those of you who are more familiar with the topology of the K3 - is there a simple way to accomplish #2 without buggering up the rig?
Thanks, Russ KD4JO