Service manual for Dell B2360dn -- need to replace battery

Where can I find the service manual for B2360dn?  Not found on Dell web site.  It's an old printer and now it doesn't keep the time or date when physically powered off (outlet is still active).  Other posts in this forum about similar printers say just need to replace the 2032 battery in there but where it is and how to get to it is in the service manual.