A wireless printer connects to a wireless network provided by a wireless router just like a computer would do.
It searches to identify the name of the wireless network and once it has located the network, it enters the wireless password to connect to the wireless network.
The printer will have the same ability to manually search and enter the password. Contact the printer manufactuer or consult the documentation furnished with the printer for specific details on how to connect the device to a wireless network.
There are normally no adjustments that need to be made or settings that need to be changed from the wireless router to allow the printer to connect.