Radiation-enabled retention features for fixtureless assembly of node-based structures

An apparatus, comprising:

• a first structure comprising a first compartment, a second compartment and a window, wherein the first compartment comprises a first adhesive, and the second compartment comprises a second adhesive, wherein the second adhesive is not within the first compartment, wherein the second adhesive comprises an electromagnetic (EM) radiation-cured adhesive and is different from the first adhesive, and wherein the window is located on the first structure to allow EM radiation to cure the second adhesive;
• and
• a second structure comprising a second protrusion extending into the second compartment and contacting the second adhesive, and a first protrusion extending into the first compartment and contacting the first adhesive to join the second structure to the first structure.