That isn't really a quick release. You'll need either the Kubota or ATI SSQA Quick attach and your bucket will need modified with a Bobcat style quick attach plate. Your bucket as it is now isn't compatible with any SSQA attachment.
You can buy the attachment plates anywhere, including Flea Bay. They are all basically the same but you will have to weld on the plate to your bucket or buy a new one with the plate already welded on.
What you have is the standard pin on bucket.
If you want to go SSQA, everything you have right now goes bye-bye.
I have both the ATI and the Kubota SSQA. One on each of my M's and everything interchanges on both. I have 3 different buckets, 2 excavation round top and one square top material bucket, 2 sets of pallet forks and a big front mount snowplow too.
For strength I prefer the ATI but having said that, I've never tweaked either one.