in the GUI manual it is on page 126 :) not the flight manual... the "GUI Manual"
http://www.digitalcombatsimulator.com/index.php?end_pos=2199&scr=products&lang=en
but basically you need a fuel truck, APA ural (for ground power) a regular URAL, and a CP Ural (command and control Ural) or something like that... but its all described in the manual.... the status rank or cone does not matter... just place them in a line and make sure they are not on the H's ....