Jeff - I also recommend Dan Stern. He has a kit that has the connectors for the back of the high power H4s that won't melt. It also has a couple of relays, relay sockets the crimp spades to connect to the relays and a couple of healthy fuse holders with fuses. I was able to get the proper color wire, to match that on the car, in 14ga and 12ga and 10ga from an NTE wire distributor near Sacramento, CA to take the current from my 130/100 H4s, also from Dan. They are a German brand, Narva, and they have been running trouble free for a few years now. I am running the 130/100 H4s with relays and heavier wire in both my Benzes. I had enough empty spaces in the fuse box of my 126 to mount the relays in there. I used some of the woven nylon plastic "chinese finger trick" looking sleeving, from McMaster-Carr, to encase my wiring in nice looms, terminated with tie wraps. You have to look real close to see that it is not stock.
Barry http://www.danielsternlighting.com/products/products.html >I was interested in going slightly overwattage and wanted to get some >relays to put inline. Does anyone have a link to a write-up for wiring >these?