Detect open toilet seat automation - need help please

where do I enter that exactly, in my template sensor?

 - platform: template
    sensors:
      toiletseat_angle:
        friendly_name: Toiletseat angle
        value_template: **{{ (state_attr('binary_sensor.vibration_8', 'tiltangle').split(",")[1] )}}**
        unit_of_measurement: '°'