At the top of the HCCC Portal, go to the Support Services tab and click "NJ Transit Discount".
If it's your first time, click on "Signing up for the 1st time?..." and follow the instructions. If you're looking to reactivate, click on "Looking to reactive..."
Click https://myhudson.hccc.edu/studentlife/njtransit/Pages/default.aspx for more information.