Do you have a custom config file you wanna create for your http injector that’s easy this tutorial will help you up and have your own customized . ehi configure file for HTTP injector
Before starting i hope you have a valid host adress and a proxy and port if so let’s start the process
If you already have a file inside your http injector you need to clear it simply click on option then clear data
After clearing your data click the left bar and tap Payload Generator ,
In the next show box you will be required to fill in your proxy an port and you will be given the format you gonna use if your proxy is 137.116.76.252 and port is 3128 just input 137.116.76.252:3128 and clickSTART
On the next screen input your server ip, then your port, now input your fastssh username and finally your password save it and start your connection
You might need to share that config to friends and have your name customized on it file just click on option the export data and type in the file name plus the description which would show up on your file home page you also have the option to lock it if you don’t want others to edit it set the option with the below screen shot 
