The center container, as mentioned, contains the actual antenna-matching network. The conductor running just below ceiling level is a mixing bus; if there were a desire to add another station to the site, one could simply plop down another six containers and extend the bus through one of the combiner containers at each tower to the new station's combiner module.
Copyright 2005, Garrett Wollman. All rights reserved. Photograph taken 2005-06-08.