Hi, the ID card is a snapshot you have to take with the live webcam, and photo as well. So I don’t know how you would do that without you being seen. However I have read a few posts where others have done it as the recording / photos starts right after the test starts
I believe you can.
Make sure your face does not show when taking your spouse's photo, and when taking the photo of the ID (on the screen, to the right, you will see an example of how they want the photo taken, only the fingers holding the card should show).
Also, before your spouse clicks 'Take test' leave the room, so that she is not distracted.
The most important thing is that it shows that she took the test alone and did not cheat.
Not everyone is tech savvy and they should not be penalised for that.