Euro light wiring

[BDBENZ]

After reading dozens of posts, I am still unclear on the wring setup for the 560 SL when converting to euro lights. When I inspected my wiring harness it is a 6 prong plug, not a four as referenced in most of the posts. I have the recommendation for upgrading the four wire to the six, but is the SL a direct plug in? I would also like to hook up city lights and side marker. I have some recommendations if they work with the six prong plug. Plug number 58 is for the city lights, and it looks like I will try to use the receptacle form my old side marker for the euro unit. Also how could I retain the rectangular turns under the bumper?

I could use someone’s past experience.

Thanks,

BD