There are a couple access spots available to you. Belmont Town Beach and Ahern Park. You can park at either of these and easily walk out to waters that hold cusk. Most of it depends on where the cusk are at in their spawning cycle. I like to focus on rocky areas around 30 ish ft. The bigger the bait the better for larger fish. The cusk like to spawn in shallow on Sandy humps.
Good luck!