Like I said, my DRO was acting fickle, so test piece first, but these are the coords i drilled on.

Center bore of axle ID should be what will fit OVER your axle housing, from the BACK, mine varied as axle housing OD isn't precision machined.
X: 0.00
Y: 0.00

Axle flange bolt holes (3/8 bolts, i cut mine under to form a tight press fit) I cut away the bottom bolt hole to allow it to fit over the axle tube, but will provide all 5 for the spacers.
1: X -.684 Y -1.660
2: X -1.843 Y -.382
3: X -.484 Y 1.816
4: X .699 Y .811
5: X 1.182 Y 1.355 Center Bottom hole

Caliper Bolt holes
1: X -4.395 Y -1.856
2: X -4.719 Y 1.961