Those lights don't seem to have connectors for a rear light? So you'd have to either plug it straight to the hub or if you want it to switch on/off like the front light, split the cable after the switch. And you'd need a rear light that has overvoltage protection to use it without the front light in between, like many of the B&Ms have, Secula Plus for example.
There seems to be a lot of conflicting information. SJS don’t stock anything that will run directly from a Dynamo yet Peter White cycles has an article which specifically says that any B+M rear light post 2015 can run directly from the Dynamo.
Those lights don't seem to have connectors for a rear light? So you'd have to either plug it straight to the hub or if you want it to switch on/off like the front light, split the cable after the switch. And you'd need a rear light that has overvoltage protection to use it without the front light in between, like many of the B&Ms have, Secula Plus for example.