Merge Tool

Ribbon Menu Bodies tab Booleans container Merge Tool
or
(Classic) Build Bodies/Geometry Merge Tool
Merges two non-intersecting rigid body geometries into one without performing any Boolean operations on the geometry. The geometry can contain any type of geometry: solid, wire, or complex. If the geometry belongs to the different parts, the merge tool merges the parts into one.
Because Adams View does not perform any Boolean operations on the merged geometries, overlapping volumes produce double-density mass in the part and change the results of the mass property calculations. Therefore, you should use this operation only for non-intersecting rigid bodies that the Unite Tool cannot combine.
Adams View merges the second geometry that you select into the first geometry you select.
Learn about Merging Geometry.