Dean,
Depending upon which switchboards you have, you should be able to find downloadable manuals from:
The Wireless Set No 19 Group -
www.RoyalSignals.org.uk
You have to request the passwords for each manual you require, but the fellows that run the site are very helpfull. Here is an example of the manuals they have for switchboards, thay have hundreds of manuals avail...
SIG083 Fullerphones, Mark IV Signal Training Volume III, Pamphlet No. 21, October 1939
SIG081 Lamp, Signalling, Daylight Signal Training Volume III, Pamphlet No. 7, 1927
561 Repeater, Carrier Telephone, No 1 Mk II Handbook, April 1943
193 Switchboards Magneto, 10 Line, No.2 Australian Military Forces Handbook (AUST) No 2, YAA3610, 1945
305 Switchboard, Magneto 10 Line (WD) Working Instructions, YA7230, Oct 1944
311 Switch Board, UC, 10 Line, Mk II Complete Equipment
224 Switchboards BD-71, BD-72, BD-72A & BD-72B TM 11-330,Oct 1943
608 Switchboard Teleprinter 40-Line Working Instructions, YB02617
Good Luck...