\begin{tikzpicture}
\begin{umlcomponent}{A}
\umlbasiccomponent{B}
\umlbasiccomponent[y=-3]{C}

\umlprovidedinterface[interface=Bpi, distance=2cm, padding=2cm]{B}
\umlprovidedinterface[interface=Cpi, distance=2cm, padding=2cm]{C}
\end{umlcomponent}

\umldelegateconnector{A-west-port}{B-west-interface}
\umlHVHdelegateconnector[st:pos=1.5]{A-west-port}{C-west-interface}
\umlport{A}{west}
\end{tikzpicture}