Take a standard figure 8 cable or standard kettle lead.
Step 1: Cutting
cut cable to length that you want
Step 2: Strip Cables Down
I used a cable strippers but you could use a knife or any sharp instrament
Put some cable shrink around cable and then twist cable together. n.b: all colours should match up.
Wrap cables up seperatly and then when cables are completly isolated put togher and rap them up again.
Pull down shrink over taped up end and heat i used a ligher but you can use anything that is hot (n.b) to hot will melt shrink cable and also might dapage cable.
Step 6: Finaly
You have a shorted cable that makes life bit easier in your bag and on the wall.