In the other modules I am able to add new or associate a contact within - however in Vendor, this is not the case, I am only allowed to create new. 

How can I, if it is possible, establish a link that displays the contacts I have in my system to the Vendor? I have a custo field setup that is a lookup, so I am able to have 1 link at this point, however I would like to associate multiple in the contacts area. 

Thanks!!