A support base includes a connector hub having a top end, a bottom end spaced apart from the top end, and a chamber wall extending between the top and bottom ends. The chamber wall defines a chamber within the connector hub. An interface may be positioned in the chamber. The interface is dimensioned such that a support gap is formed between the interface and the chamber wall. The support gap may be dimensioned for receiving a wall of a support structure having a hollow interior into which the interface is received.