A Bridge Board is also a nice solution for the fuses before the rectifiers in the backbox.
http://home.kpn.nl/inkochnito/index.htm
Available from Big Daddy Enterprises and Marco Specialties.
When you visit https://nvram.weebly.com/wms-sss.html also order a nvram for this board.
Get rid of those batteries.
Peter
http://www.inkochnito.nl