This International Standard specifies the dimensions and electrical characteristics of the double-pole connection required for the interchangeability of the electrical connections used to supply additional appliances in road vehicles with a nominal supply voltage of 12 V or 24 V d.c. This title may contain less than 24 pages of technical content.
You can specify the type of files you want, for your device.ISO 4165:2001, Road vehicles - Electrical connections - Double-pole connection | ISO/TC 22/SC 3. I was recommended this book by a dear friend of mine.