2.1.1190 Part 1 Section 22.214.171.124.11, cxnSpLocks (Connection Shape Locks)
For additional notes that apply to this portion of the standard, please see the notes for picLocks, §126.96.36.199.31(a) .
a. The standard uses a shared attribute group for the locking attributes of shapes, pictures and other graphic objects.
Office ignores attributes noChangeShapeType, noEditPoints and noRot when applied to a connection shape.