If you right-click on the VI's icon in the top right corner and select patterns you can select a connector pattern that has more terminals. The maximum is 28.
If you ever need more than 28 the solution is to use clusters and arrays.
You can also adapt it exactly to the number of terminals you need; if you have 16 and just want one extra just right-click on the pattern (where you assign terminals) and choose to add a terminal.