side marker light hood up to European lamps

[Bob G]

I own a USA 1968 280SL with lighted side marker lights and I am installing a set of new European Bosch lamps to replace the LE 1667 AC lamps united with American 7inch round headlights. I Have been told that you need to hook up another wire to theside maker light front in order for it to work.

Has anyone done this and can you help me by sending me instructions and some photos of how the hook up should appear. I do not want to have to cut into any of the factory wire harness and hope there is another way.

Also is there a halogen bulb that is brighter than the 12Volt 45/40 W P45T stock bulbs?
thank you for all your replys and help and Happy New Year.
Bob Geco