What are the holding procedures in Canada? On the approach plates, they say
something like "Climb to 1900 on track of 297 deg. LEFT turn to 2T NDB."
However, they don't show any holding pattern. Do they expect you to enter a
hold at the beckon? What radial do you use?

I'm guessing here, but based on what you've written it sounds like a missed
approach procedure and that the intent is that you'll climb to the altitude on
that heading then once at the altitude fly direct to the fix. My assumption
would be you'd hold on the heading you arrived on, right turns, or you'd get
further instruction from the controller. Another thought is that if the fix is
on the final approach course you'd hold on the approach heading outside the fix
and make the turns on the same side as the procedure turn.