I can hot wire a Chevy but I wouldn't know where to start on a tank.......
No need to hotwire an armored vehicle. Locks are only on the hatch(es). If low batteries, plug up a slave cable from another tank. Shift in park/neutral, fuel on, thumb the starter, & hundreds of eager horsepower should await your command.
After you have neutralized the crew, of course.
;^)
I think they just leave the keys in the sun visor. No need to Hotwire.
You should watch "the Chieftain" review some tanks. Most have a master power switch, then a starter button, usually both accessible to the driver, since he's the guy who gets in first and warms the beast up.
http://worldoftanks.com/en/news/21/