First find out if what you are implementing is a Module OR an actual subdevice. For example: Wago's 750-354 is an EtherCAT-Coupler, which is an actual subdevice with pdo-mappings,coe,eeprom etc.
Add the Module Identification of the Module that you are trying to add, as a productId to this match statement and set if it has tx and or rx capabilities correctly (VERY IMPORTANT)