Which port does OpenShift's route refer to in the targetPort field, a service port or a container port?

Question

Openshift

For example, there is a route that refers to 9081 targetPort,
then if this is the case in the service, it will transfer the container port to 8080:

- name: http-8081
      protocol: TCP
      port: 9081
      targetPort: 8080
    - name: http-8080
      protocol: TCP
      port: 9080
      targetPort: 7081

but if you add another target port, then it will send to container port 9081:

- name: http-8081
      protocol: TCP
      port: 9081
      targetPort: 8080
    - name: http-8080
      protocol: TCP
      port: 9080
      targetPort: 8081
    - name: https-8443
      protocol: TCP
      port: 9443
      targetPort: 9081

and now the question arose, does it look for a match in the targetPort service at the beginning, if not found, then already by the service port and redirect to the service targetPort?