Lippert makes at least 3 styles of slideouts and I wouldn't be surprised if there were a couple more kinds that they sell that I'm not aware of.
So, can you tell us what kind of slide out it is? Schwintec, ThinRail, Under Floor, Thru-Frame????? Cause that would help.
I put your RV info in your title to hopefully attract someone with direct knowledge to respond to your question. You might look at the 3D Parts list to get a better look at the motor and it's location.
https://catalog3d.winnebagoind.com/2013/13wfe27n.htm
I looked at your Parts list and it's a Schwintec Slide. The motors are at the top on both sides. Supposedly you can fold back the seal and get at it and it is removable by unplugging it and moving it out.
This video is from 2014 - he talks about Lippert has added a notch to easily get at the motor. Since yours is a 2013 you may not have that. In the video he says the older versions you had to remove a trim strip with screws all the way down to get at the motor. Perhaps that is what you need to pay attention to??