The flow isn't really forceful. It's main intent, I believe, is to provide cooler air to the electric components. It is possible that the seal between the fan and the ductwork has deteriorated, allowing air leaks into the right fender cavity. Also, rodents will often build their condominiums inside the ductwork. The tubes can be unbolted from the trunk wall for some limited visual inspection. I suppose a very good shop vacuum attached to the tube pointing at the coil might be used to try to pull out anything within the ductwork. You would need to block off the tube end at the alternator to get the air to be pulled through from the fan area.
The fan can be accessed by pulling the top of the trunk carpet down from the upper right end of the trunk. It's tucked up underneath the top of the fender. Once pulled down, the blower motor is right there. You can also see the rubber seal where the motor mates up to the ductwork.