Air Door Actuators

Air is cooling and blower is working but air is not coming out of the dashboard vents. I ordered two air door actuators since I saw two actuators under the dashboard. One on the passenger side over the glove-box and the other one over the pedals on the driver side. I bought two actuators just to be sure. They are both Doorman brand. One is the 604-218 auxiliary/temperature version. The other one is the 604-228 main/mode version. My questions are; does the van have any more under the dashboard? Air is also not blowing in the rear of the van. But that problem will have to wait a bit. Which actuator goes under the driver side and which one goes under the passenger side? If there is something else I should be looking at to get the air to come out of the dashboard properly, please let me know. I am just an amateur trying to save a couple of dollars. Thanks for all the help.