As you mentioned you need to select from a drop down list.
The optimum solution will be to just see how many max characters are present for each option in the drop down list and then take only those many characters from the queue item.
As you mentioned once list item as “Load Disp ENS - WI”, this signifies 18 characters.
So just extract first 18 characters from the queue item.
One of the many way is to use Left function.
Left(QueueItem.toString,18)
Just in case you need below is a useful post related to the string manipulation.