T4 -- Installing new front disc rotors & pads

[jets]

After dismantling the front brakes & buying the new parts I decided to read the instructions enclosed with the disks.
The brand I bought is Textar & half way down the page under "NOTE" it says
" With ventilated disks [rotors] check for direction of rotation"
I have looked over the rotors & can't see any marks/arrows & the ribs look to be radial.
The following remarks only talk about fixing bolts to the correct torque.
Perhaps their remarks apply to rotors different to mine that have grooves machined into the faces to remove water.
Any ideas gents.[& Ladies]?

[Umai Naa!!]

Left and right are boxed seperately, with different part numbers with Textars.

If they're in the same box, they're identical.

[jets]

Thanks. The discs were packed together in the same box. I can now install with confidence.
As everyone knows, there is no substitute for the experience of others.