[Richard777 (OP)]

Four “Kerr-Newman vectors” connect together giving the Kerr-Newman metric.

There are two types of KN vectors;
-   displacement vectors
-    incremental vectors

A displacement vector has components representing length scales, which are associated with characteristics of matter.
An incremental vector has components which represent increments of change.
Two vectors of each type are required.
The four vectors must relate to each other.
There are also two types of connection. A “component connection” occurs if two vectors share a common component. An “angular connection” occurs if two vectors share a common angular geometry.
Is “vector connection” a valid procedure?