\begin{tikzpicture}
\draw (0,2.5) node[minimum height=1cm,minimum width=3cm,draw] (A) {A};
\draw (5,0) node[minimum height=1cm,minimum width=3cm,draw] (B){B};
\draw (5,1.5) node[minimum height=1cm,minimum width=3cm,draw] (C) {C};
\draw (5,3) node[minimum height=1cm,minimum width=3cm,draw] (D) {D};
\draw (5,4.5) node[minimum height=1cm,minimum width=3cm,draw] (E) {E};
\draw[-latex] (A) -| (B);
\end{tikzpicture}
I managed to draw the boxed per my requirement, I want the arrow to connect to the left side of the box B. Not sure how to do it. Regards Aku