A large room needs two heating mats. How to connect several heating mats?

The heating mats should be arranged accordingly, that the power cables of both mats could reach in the thermostat’s installation box. The total power of heating mats should not exceed 16A or 3,2 kW.

The power cables are of different colours. Connect cables of the same colour (brown to brown, blue to blue), and then connect the thermostat. The protective (braided) screen is connected with another protective (braided) screen, and by using a separate clamp, is connected to a yellow-green power cable.