On Prowlarr 

go to Indexers and click Add Indexer add your sites and then save

go to Settings and Applications click the + sign to add an app ( you Must have the app you want to link to installed ) 

for this guide we will use Radarr but it is the same thing for all app's

Sync Level   Full Sync

Radarr Server  http://localhost:7878/radarr

Api key your find this on radarr under General 

Test and save it will now auto connect to Radarr and search for your content 

with Sonarr the url is http://127.0.0.1:8989/sonarr ( due to a prowlarr bug you need to go to settings general on sonarr and change the bind ip from 127.0.0.1 to * and then restart sonarr ) 

       Lidarr the url is http://localhost:8686/lidarr

      Readarr the url is  http://localhost:8787/readarr

     Whisparr   the url is http://localhost:6900/whisparr

Update some apps now need to have 127.0.0.1 instead  of localhost !! edit the above lines to match your needs

Prowlarr host is http://localhost:9696

How to connect to your local Sonarr/Radarr

First you need to go to Advanced on your Dash add 9696 as your Internal port and make a copy of the External port 

Now Open Prowlarr  

Go to Settings General  and change the Bind Address from 127.0.0.1 to *

go to security change to basic  browser popup set a username and password 

Change Cert Validation to Disabled

Make a copy of your API Key 

Restart Prowlarr

We will use Sonarr for this guide but it is the same steps for Radarr

open your Local Sonarr  Click add Indexer then click Torzab

Name your Indexer 

UTL will be your seedbox url with the following edit 

http://fullseedboxurl:Externalport/1/  so for your first Indexer it should look something like this http://345.ftl78.seedit4.me:8101/1/  

Add your API key

Hit test and save 

If you have more then one indexer you can look on prowlarr at your indexers press Indexer Info on the far right of each Indexer you need the Number After /prowlarr/ and Before api ( /prowlatt/5/api so here it would be 5)

then your url layout on your local sonarr would be 

http://345.ftl78.seedit4.me:8101/5/