To be fair, this eastern-most monument is more alike the possible cairns noted upon Deans Moor (below to the approx north-west) than those at the summit of the hill.
There is a resemblence to the cairns of Harbourne Head. I think that they are connected to all the other cairns around here. On the summit there are 2 cairns about 45m apart with a 3rd one about 400m to the East. Of the summit cairns the South-Eastern one measures about 10m, the other about 17m.