Rich,
The TM that I have is TM11-2718, Installation of radio and facsimile equipment in car,half-track M2A1. It is dated June 1945 and has installation directions for the noise suppression kit, fax equipment rc-58, radio sets scr-193,284,506,508,528,608,510,610 and 593. It includes lists of the radios and equipment used to install the different radio sets and their locations.
Gary