Assigning a type to a binding connector in SysML?

[bknoth2]

Create a binding connector between two parts in a SysML IBD. Press Ctl-L to "set the connector type." A dialog box pops up (image below if all went well, otherwise look here: https://ibb.co/sWhC8qW) with a column for "Classifier Name" and one for "Association." I don't see any way to select something or assign a classifier. What am I missing?

Thanks