Are these new?
Yes, it seems so for 2018.
Are they easy for the do-it-yourself person to sold
Dave, while I haven't soldered these connectors, coaxial light cabling is pretty easy to solder if you have soldered coaxial antenna leads.
The process is usually a four-step one:
1) Cut through all outer insulation in a round cut till you get to the inner lead protection.
2) Measure back about 4.5mm and cut through the outer jacket only, exposing the outer woven conductor sheath.
3) Fold/roll back the woven sheath over the outer jacket and insert into the connector.
4) Solder the center conductor to the center post and cut off the excess center lead. Usually the outer conductor will screw on over the outer woven conductor.
However, some coaxial conductors are solderless and get by with a combination of crimping and heat-shrink connections.
Schmidt/SON offer a little jig to make soldering easier, but it is not strictly necessary. Some more details can be seen down the page here:
http://www.peterwhitecycles.com/schmidt-headlights.phpHave you seen the SON junction box variant on these connectors? They do as some of us have done already and use a single two-wire lead to the dynohub, then split that two ways, one to a headlight, the other to a charger.
Best,
Dan.
