Im not sure on the specific wiring, but wouldnt a Scotchlok connector be more suitable for this?
http://www.3mdirect.co.uk/p-1499-scotchl...00-pk.aspx
Saves cutting any wiring at least
http://www.3mdirect.co.uk/p-1499-scotchl...00-pk.aspx
Saves cutting any wiring at least
