[Motorola] Alert Monitor

[Don]

I have a Motorola Alert Monitor Low band , set up for The Indiana State 
Police , Base on 42.42 and mobile on 42.26 , This unit has a second osc in 
it,  So I can actually receive both freqs at the same time, I Have a 
Advanced receiver research Pre amp that I would like to put in , But I 
would rather run everything off 12 Volt input, I have it on AC Now , Can 
anyone Please tell Me what Pins on the Back Would Be for 12 Volts in ? I do 
not have the Manual

Sorry forgot to add,  I Also Would like to know What is on the Test Plug in 
case I put up a Beam to add a S-Meter

                Thanks Don KA9QJG