If you want to do a Neat Job, it takes some Minor modification, but is not difficult....

Sometimes (depending on when your truck was manufactured and what the Tolerances were) one of the rear shocks Might rub on the Tab that secures the Battery case.
I had to Dremmel that Tab off.
You will also need some new Hardware (screws/washers) that you can get at your LHS or online.

The Mod is Worth the Effort though.
The TMaxx shocks make a Huge difference in Handling Big Air landings....