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Yes, there should be one hose that comes off the cold pipe, goes to a Tee, with one side of the Tee going to the AAR (Aux. Air Regulator) that's located right under the throttle body, behind the upper radiator hose. It looks similar to this;
The the other side should end up feeding the idle control assembly on the side of the intake manifold. It contains the IACV and the FICD.
If you're pinching the hose before the Tee and the idle drops, then one of the 3 idle control valves that Nissan used on this engine is stuck open. Try pinching the hose shut that goes to the air regulator, which is the valve under the throttle body, behind the upper radiator hose. It's very common for them to get stuck open and cause problems.