Ex: Slice a Solid

Slice by 2 points

Home tab > Solid Editing panel > Slice

Select the top part, press Enter

Snap to 2 points

Pick a point behind the solid

Keep the back part

Slice by Plane

Start the Slice command

Cross-select all the parts of solid

Select YZ option on command line

Snap to the center of the hole

Pick a point on the right side of the solid to keep this part