Trek Domane panniers
I think the mounting points are for fenders only. 

If you have the rim brake version you could use a pannier rack with Quick Release Axle adapter. For example this one directly from Trek or this adapter from Tubus with a Tubus Fly Classic rack.

Considering the relatively lightweight wheels, the road rim brakes, the carbon frame and the frame geometry I’d try to keep the weight low. More than 12kg of luggage (including panniers) is probably a bad idea.