Niagara scratch module in 4.25 "MapGet" node default value.

Hi, I have been messing around with the scratch module for a while but can’t get the “default value” pin to work with all my custom parameters. I searched on Google with no answer, NewBing’s AI told me there should be a “Add Default Value” in the context menu but there isn’t. Also if I drag to connect something to the pin location, it says “Pin doesn’t support connection”.
So how can I enable the default value pin to any parameters? I saw this in a lot of the pre-made modules so it’s definitely possible. I just can’t figure out how to get it to work.
Any help is welcome! Thanks in advance!

Edit: some values work like vectors when I switch default mode to custom, but Quaternion just won’t work.