The only schematics available is going to be the diagram I have attached which shows a pair of 12V batteries wired in series and wired in parallel. You are going to want to wire your batteries in parallel should your motorhome have a 12V system, which is likely. This will give you 12V power but double the capacity. view full answer...
Thank you for the photo and information!
Since your Kwikee 39 Series Steps were made in 2002 you need the Replacement Gear Box and B Linkage for Kwikee Electric RV Steps # LC379161. view full answer...