This machine is a favorite of mine, a KomatsuŽ WA800, based on Zbiczasty's design. There are some minor differences, and one major. For instance I've added a snow shovel attachment. Also it does not contain all the extra pneumatic hosiery that Zbiczasty's does. And, as you can tell, it doesn't even have the same wheels.
It contains a pendulum axle, which I had to figure out myself, since Zbiczasty's pictures do not contain a detail.
Now on to the attachments. This attachment feature is not found on Zbiczasty's, which is why I needed to make one myself.
Whichever I use, will attach like so.
And each attachment is locked on using 2 red quarter-round liftaxle pieces.