Mate Port a Screw to the Union Cap
Create an Insert constraint, inserting:
The port_a_union_screw into
The top left screw hole in port_a_union.
Name this constraint “port_a_cap_screw”.
Port B & C Union Constraints
Follow the same steps as above for the Port B & C unions, and the Port B & C union screws. Use similar names for the constraints that you create. See image below:
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