You only have to upload your Update to Dev Host and after that dev host automatically tells you the md5 of that zip file, now goto the otaupdater site and sign in now goto add you rom and fill the forum
in the download link just to this
Open your update file (You uploaded in Dev Host) you will get the md5 of the zip and the download link button. Just click on Download button and Cancel the download You just need the direct URL to your ZIP so copy that download link and paste it in Form
for MD5 fill it with the md5 that dev host shows you!
See the Pic Below:
Dont forget to thanks if worked!