These can include billing and booking contacts.
Each Organisation contact can have some basic information (such as Forename, Surname, Email etc.).
You can add or remove Team leaders from this list. However, be careful to remove only inactive users.
If you want the organisation to approve the timesheets, (these will be organisation users that are logging into YouRecruit), then just invite the contact to the system. Just edit the contact, tick Send Invitation Email and save the form. An email with login details will be sent to the assigned contact email address.