Hi Bill,
Those are both inputs.
I don't think you want to short them together.
The DVM input has no rectification.
As I understand it, the RF input is for troubleshooting.
You can plug one end of a wire into pin 2 of JP17 and use the other end of the wire as a probe.
Then you can roughly see the power on the battery meter (where no reading means 0 and full scale means about 5W).
I vaguely remember the discussion of this feature on the QRPLabs group.
But I don't remember if it is really intended for permanent power monitoring or if there may be unintended side effects of leaving it hooked up that way.
Here's the manual section:

73, Mike KK7ER