Installed mine last night. No problems and they look great. IMO, even better than the DDM Tuning 35W HIDs and Morimoto Elites with upgraded bulbs I tried. Best of all there's no having to stuff ballasts/igniters or drilling caps like all the HID solutions.
Like all H7 bulb bases in our S10's, the notch goes at 7 o'clock like someone mentioned (there's nowhere in the manual or service manual explaining this, so a newbie heads up)
Get a little creative stuffing the right angle spade connector and the little box for each bulb inside the housing and make sure you're not wrapping or pinching any wires on the heatsink fins or fan itself. I had luck stuffing the boxes towards the center of the headlight housing and the right angle headlamp connector more towards 6 or 7 o'clock. You'll have to fidget a little bit, but once it's inside the housing it moves about freely, you shouldn't have to force anything.
Take care making your bulbs are seated flush, you'll know pretty quick if they're sitting cock-eyed in the housing. ::008::
Glad I waited for the caps - makes it all look OEM ::017::