No, I just wrapped it around the perimeter leaving the face of the diffuser open. Originally I just held the card up there but noticed my hand reflected in my eye. I then put on a wool glove to mask my hand, but noticed the spill from behind the card so wrapped the cloth around it and taped the card to it this time instead of holding it. The hole in the card was about ½ an inch in diameter.
The flash was set to TTL with a minus 1 2/3 EV.I originally had it just on TTL, but there was these weird flecks of white scattered around the catch light so I dialed in the minus EV to see if they would disappear, they did. But then that made me have to recover the lowered EV in post.
The flash was attached to the camera via an SC-29. The camera was set to M mode with 1/200 shutter and f/32. The ISO was set to 200, only because evidently that’s what it was set to last time I used the camera, otherwise I would have preferred 100.