Companion LINK failure with Roon AIR

[audio_engr]

Need a bit of advise from you guys out here ... 

Ideally ...

Scenario - 1 :  Take 110 ohms AES/EBU cable, terminate Destination Male XLR with Pin1 = Gnd; Pin2 = +ve; Pin3 = -ve and Source RCA with Centre = +ve; Body = Gnd and -ve

OR

Scenario - 2 :  Take 75 ohms S/pDIF cable, terminate Destination Male XLR with Pin1= -ve; Pin2 = +ve; Pin3= -ve and Source RCA with Centre = +ve; Body = -ve 

Meanwhile ... I recall reading somewhere here that Destination Male XLR Pin1 should be left Blank.

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I also had a chat with Daniel of Oxford Audio Consultants and they confirmed that they've had no issues or any sort when they used the AQ Diamond RCA-RCA ... they haven't tried the mixed RCA-XLR so they couldn't say anything for that ...