Just to clarify, what we're talking about here is the holders for the carbon plungers that pickup off the wheel backs, not the motor brushes in a Buehler motor?
Assuming I'm correct in that, then I've soldered wires directly to the pickup holders in a Hartland motor block (when converting it to DCC), to replace the thin brass wire contact strips that normally make the connections.... shouldn't be any different in an LGB one....?
Jon.