supply

So I'm about to take a feed from the side light in order to get a 12v switched supply to my new tomtom. Am I best tapping into the sidelight supply close to the bulb itself or further back on the loom. Access is very easy close to the sidelight bulb on my gen 1 and probably the easiest way but...

Not too clued up about electrickery so looking for some advice. Have ordered a 12v usb socket to run a sat nav. Before I fit it want to know if it will drain the battery if nothing is plugged into it? Also will the alternator be man enough to cope with the extra drain running a sat nav off it...

I was thinking of fitting something like these on the fuel supply line, to make taking the tank off less hassle: MOTORCYCLE QUICK RELEASE FUEL LINE COUPLER KIT STRAIGHT | eBay Has anyone done this? Can anyone think of any reason it wouldn't work? Anyone know offhand what the ID of the supply...