A dremmel is best but I've used a small flathead screw driver and a lighter before ...McGyver style!
Do it. Both harnesses are rated for 60w. I did my neighbors Teg last night and I've had mine that way for 2 or 3 years now on the Camry, best DIY mod I've ever done. I've pretty much done the like on all my cars.
It goes well with Sylvaina Silverstars too.
Hint - pull the colored rubber ring off the 9006 bulb and put it on the 9005 while still retaining the original ring on the 9005. This will reduce vibration thus reducing filimant detachment as the 9005 is a short curly smaller than the 9006.
Good Luck.