RM4 2kW heater as replacement for 4kW unit?

[Jens_Think]

Hello,

I was offered a used MES-DEA RM4 2kW heater (ID-NO: 30.99507.03, 200-450V, 70°C) as a replacement for my defective 4kW unit.
The 2kW unit looks mechanically different, e.g. the 3-pin-connector is placed on the side instead of the top.
Can it be used as a direct replacement anyway, or are there mechanical/electrical changes needed?

I couldn't find info about the dimensions or the configuration of the 3-pin-connector on these heaters.

Thanks in advance,
Jens

(Think city 2008, for sale)