USB-SDP-CABLEZ where is pin one on the micro-match cable connector?

Hi timcam, apologies for the delay.

Pin 1 is indicated by the square pad near the Z in "USB-I2C-ADPZ". If you flip the board over so you can see the Analog Devices logo, pin 1 will be in the top left hand corner of the board.

As you asked specifically about the cable rather than the board, "Pin 1 / SCL" does correspond to the red stripe and the location circled in your screenshot.

David, thanks very much for confirming pin-1 & SCL location.