The Heat output on the board is 24 volt but the power supply in not enough to power a 200 watt heater
You will need an external power supply with 250 watt at 24 volt and use a relay to power up the heated bed
This is the schematic you will follow
I did the same thing and works perfect with ¼” thick glass
You also have to enable the HBP from printer’s settings and change the START and END GCODE for your printer to include the HBP and set temperature
To enable the HBP go to the printer menu under utilities under general settings scroll down until you see the option HBP installed is set to NO turn it to YES exit the menu and reset printer from the reset button
If you do that before install the thermistor you will have the following error on the printer
Platform failure! Temperature reads are failing! Check wiring!