Hi Deborah!
Congrats on the Elkridge! That is a great rig. As for cranking them in, absolutely. The rig comes with a special crank that is used for the project. You will find it either in the basement pass through or in our case, it was up front in the nose compartment. It's about 4' long. Hard to miss. I can't tell you about the location of where to insert the cranks in the slides. Your model is different than ours was. I do know that the location for attaching the crank for the landing gear is in the propane area.
Your dealer should have covered all this with you. If he didn't either call him back or call Heartland Customer service. They'll be glad to help you!!!!
Good Luck!