How do I call the manager specifically if I need to set up an orientation meeting?

When I had gone through the hiring process I had to call the front/Customer service desk to be connected to the manager...

Call customer service

Ditto

Call the store and ask for the human resource manager they are the ones who hire

There is no way to get in touch with the manager directly, unless you or someone else know him, if not, you will have to go thru the regular channels.

Go to customer service