Well,as noted above by previous posters,it isn't a multi-turn pot,it's just a conventional
trim pot,where the two outer connections go to each end of the resistive element,& the
centre connection to the moving contact.
Identifying the connections on real multi-turn pots is not quite so intuitive.
If you are connecting a number of them,it is quite easy to wire one wrong,then copy that
one for the remainder.
Bourns show a circuit on the case of multiturn pots so you don't get confused.
When in doubt,test it with the ohms range on a DMM.
VK6ZGO