Jon, if I had more hair we could split a few.
Technically that piece between the jack rafters is known as the wall plate. I think the best bet would be mounting on the brick wall, conduit to the attic through the wall plate.
Next would be mounting to the jack rafter with a backbox by manufacturer and using either a turret (eyeball) or bullet for the most flexibility.
Either way some conduit would show, unless he can fish the wire through the interior wall and the brick is simply a front. Typical in US housing but I don't know the overall construction of the area.
As a note, I used to install and wired the entire perimeter of a Frank Lloyd Wright house without showing a wire or damaging the concrete blocks interior or exterior with Eric Wright, grandson, monitoring the process. 50+ alarm screens and doors, multiple smoke detectors and keypads.
Good catch on the naming. Hair splitting or not.
Greg