Just spotted something unusual with one of my DW link pivots. It’s got a grease hole in it?

The way I see it then is when you inject your grease iit’s going to have to flow all the way inside the hollow pivot to either end where the hexagon pegs of the DW link engage before enough pressure will build up to force grease round the spiral grooves of the pivot?

Surely that can’t be right?

Stu