style set query

I want to Edit the value of the connector property by using query expression, I want to know a query that returns a
value.because  when we will use a regular expression.

Example, Property 12345678 → 1234-5678

8 character check
^ [0-9] {8,8} $"

edit value

^([0-9]{4}[\s-]?){2}([0-9]{4})$