Driving Lights

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Pin 30 is the power supply which you should run direct from the battery using 6mm cable via an in-line fuse of suitable rating to suit the current draw of the lights which will be 18 amps if the lamps are 100 watt on a 12 volt sytem so I would use about a 25 amp fuse.
Pin 31 is the earth which you should also run direct to the battery.
Pin 87 (& 87a if fitted) goes to the driving lamps. Make sure you run the earth leads from the lamps back to the battery also.
Pin 85 is the earth end of the switching relay.
Pin 86 is the positive end of the switching relay which you connect to the high beam circuit via a dash mounted switch so you can have high beam with and without the driving lamps.
If the lamps you are fitting are any good don't forget you will now need to dip your lamps much earlier especially on long straight sections of road not only for oncoming traffic but when following some one as well. As a general rule if you can see their tail lamps or headlamps yours should be dipped.