I'm not familiar with that call.
The reeds usually are pointing towards the open end for blowing. Only exception I know of is a crow call that has two reeds pointing out but they are captured inside a housing. Those you blow on. They are often called 'tongue biters'.
OK, before finishing this response, I went to my PSI catalog and found your picture is straight from there. I have never seen this set-up. Just try it by blowing on the open end. Don't put in mouth, just purse lips to the opening.
I had half a dozen call suppy sources before I had to format my computer. If I can ever recover them, I'll post a list. Check the HUT catalog, they have a lot of supplies also.
BTW, tone is everything. Soft woods don't make it for predators at all.
"Folks is funny critters."
Think for yourselves and let others enjoy the privilege to do so, too. ~Voltaire