Consent template applies only to Service Explicit messages. This does not apply to Transactional or Service Implicit messages.
The consent template is a message that is sent to them asking them “consent” to send the messages regarding your service, much like an “opt-in” message. In case they are not interested, they will choose not to respond or respond with “no” post which you would not be able to add them to your database for communication, and neither would you be allowed to send further messages to them for explicit content.
This would not apply to Transactional or Service Implicit, since these messages are sent to customers who have already registered for a service that you are providing, thereby giving you “consent” to send them transactional and update relates messages.