Looking to add a scale node that connects a vector output to an offset input portrayed in the image above.
Just to be able to close this question, a short answer:
Most mathematical operations hide behind the nodes
Vector Math, which can be found in the category Utilities and Vector respectively.
So if you see a node that does not appear with its name in the list of available nodes, it is almost certainly one of these two nodes whose property has been set to a specific mathematical operation, and thus also shows the corresponding name in the title.
The operations available in Vector Math are:
The operations available in Math are: