The 4411s have a screw terminal so you can wire directly to the back of them. When I cut the sockets off I left some wire on the socket end in case I decided I wanted to go back to them. Then I just extended the wires with a 4" or 6" piece of wire so I had plenty of slack and screwed them to the terminals on the back of the bulbs. I think these are the bulbs I bought (you can buy them locally at some autoparts stores).
The bulbs are slightly large so the trim ring on the spotlights doesn't quite close (I don't remember if it did before I swapped to the 4411s). It comes within 1/4 or 1/8 of an inch of closing completly and it is on the bottom of the spot where you cannot see it anyway.
Any "PAR36" bulb should work, Bulbman.com has narrow spots, wide spots and flood lights in various wattages. I am running 33 or 35 watt bulbs without any problem. I think 55watt might draw too much and run too hot for my tastes. I run my spots all the time. Regardless of if my headlight is on high or low beam.
It didn't matter which wire went to which pole, I started with connectors (there is a screw and spade on the back of the bulb) but one wire broke off at the back of the spade after a couple of weeks so I cut the spades off and used the screw.