Brake unit selection depond on inverter power, user can consult with the brake unit merchants, wecon does not sell brake units.
Don't remove short splice beween P and +, and then connect brake unit between ''P and -'' or ''+ and -'' terminal as picture shows below:
After connect brake unit, set FA.03 as 0 to disable overvoltage stall protection to take energy brakes.
Note: The selection of braking resistors is shown in the following link：
https://docs.we-con.com.cn/bin/view/VFD/VB%20AC%20Drive%20User%20Manual/Appendix%20A/#H1Brakingresistorselection