Abstract: A mounting plate having an orienting portion facilitates orienting the vacuum connection opening of the mounting plate with respect to an anticipated orientation of a receptacle and electrical box. The orienting portion is optionally releasably attachable to the main body of the mounting plate which main body comprises the vacuum connection opening. The mounting plate is mounted prior to installation of the electrical receptacle in the electrical box. The orienting portion of the mounting plate facilitates orienting the vacuum connection opening in a known orientation with respect to an anticipated orientation of the electrical receptacle when inserted in the electrical box. After installation of the inlet valve and the electrical receptacle, a hose cuff having standard electrical terminals oriented with respect to the vacuum connection of the hose cuff may be simultaneously inserted into the electrical receptacle and the vacuum connection opening.