First login as Student,

  1. At the top of your dashboard, click the module access icon > Academics> Placement
  2. He/she can see the placements in which they are added. Click on the respective placement event. 
  3. There will be an option view Invitation. Click on it to view the application.

A new page will be displayed from where the student can apply for that placement event. Refer the figures

Fig 1.

Fig 2.

Fig 3.

For more information, watch this-