[Zeroman]

They are spot welded to the bedsides.

The spot welds need to be drilled out to remove the angles so you do not damage the bedsides.

New angles can either be spot welded back on, or plug welded if you do not have a spot welder.

Be sure to measure the location of the angles relative to the front/rear position from the end of the bedsides, and the vertical dimension from the top of the bedsides.

Also, there is a left and a right angle. The position of the holes will determine which is which.