This is the adaptation to XT90 connector of my XT60 connector grip.
Not only a scaled model, it is a deep redesign due to significant differences between the detailed shape of the 2 connectors (grip area).
As for the XT60, this design is for the most common XT90 shape. It may not be compatible with other special shapes from different brands/manufacturers.

You can see the video linked on XT60 grip page for post-printing operation (support removing) which is even more easy here (can be made easily with fingers, see it in the video).
https://www.thingiverse.com/thing:6411288