All done. As I said, a set of rubber-covered clamps to a flat plate and the LED lamp body secured with 3M Weatherstrip adhesive. I have the /5 switch-board modified to have a headlight & bright DRL-only (no taillights) for daytime and another setting for headlight-taillight-night brightness marker lights. At night, the DRLs were almost obnoxiously bright and I was able to use a dim setting.
They provide a distinctive bright triangle pattern with the headlight in the daytime mode, and a distinctive pattern with the headlight and running lights in the nightime mode.