How anchors are used during training

We have x=image data set of size (m,6086083) and Y will be (m,19,19,5,85)

I have printed anchors in lab.

[[0.57273 0.677385]
[1.87446 2.06253 ]
[3.33843 5.47434 ]
[7.88282 3.52778 ]
[9.77052 9.16828 ]]

During training how the anchors will be used?
At which stage it will be provided to the YOLO model.?
how these numbers will be used during training?

Which assignment are you working on (week number and assignment name)?