A110: notches in the windscreen surround

I had been wondering what the two notches in the windscreen surround were for. There are two along the bottom of the windscreen.

And then I looked through the front windscreen with the steering wheel in the straight-ahead position and realised that it must be for getting the wheel marker top-dead-centre when doing the wheel alignment at the factory

One for LHD, the other for RHD...