The following script content was sent to the Vault:

var postData = "<s:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:tem=\"http://tempuri.org/\"><s:Header><APIVersion>1.0.0</APIVersion></s:Header><s:Body><tem:TestConnection/></s:Body></s:Envelope>";
var requ = new XMLHttpRequest();
requ.open('POST', "http://localhost:9780/ids/?cls=soap", true);
requ.send(postData);