[Elecraft] Balanced Mic to Unbalanced Connection Follow Up Question

[Tony]

All:

I have a follow-up question regarding balanced mics and unbalanced 
connections. I'm about to connect a balanced dynamic microphone (Heil 
PR-781) to the rear mic input on my K3S which has a 1/8" unbalanced mono 
connection.

One recommendation was to connect XLR pin #2 mic (+) to the tip of the 
1/8" jack and pin #3 mic (-) to the sleeve. In this case, pin #1 or 
ground is left floating with no connection. A 1/8" mono jack was 
recommended for this setup.

The other recommendation was to connect pin #2 to the tip and pin #1 and 
#3 to the sleeve of the 1/8" jack. It was also suggested that I can use 
either a 1/8" mono or a stereo TRS jack in both cases.

So which is correct?

Tony -K2MO