CCX Admin API URLs in Finesse gadget?

[Occipital]

Since CCX is all served from the same box, am I able to use relative URI's when requesting resources from the UCCX Admin API?  Meaning - can I just do something like:

fetch("/adminapi/csq/5023/schedules", {
  method: "POST",
  headers: {
    "Content-Type": "application/json"
  },
  body: aNewScheduleXML
})
  .then( r => r.json() )
  .then( data => handleResult(data) );