Battery fixing at Volvo -> just snapped in?

Hello, I want to change my battery soon (Monday) – can it be that the Volvo all in all (or only at 850) are only cracked? I can hardly imagine that such a plastic part should hold the heavy battery (especially when driving by people *feiff, look into the air*). Good ride! Torsten – the XC fan (hopes otherwise that the poles are already greased with the new battery and that my conventional tool is sufficient for the pole screws – first cut off plus pole, then minus pole and to bridge a 9V battery at the cigarette connection – or?)