I have found the answer here:

[HERE][1]


I hope this helps someone who needs this.

Here is how it worked for me:

On Client:

 Enable-PSRemoting
 Enable-WSmanCredSSP -Role "Client" -DelegateComputer clientmachinename -Force

 

Also, go to gpedit.msc and look at the following policy: Computer Configuration -> Administrative Templates -> System -> Credentials Delegation -> Allow Delegating Fresh Credentials and Allow Delegating Fresh Credentials with NTLM.
Enable the state and add SPN to Server List for Remote Server(Sandbox 7). In our case it will be: WSMAN/clientmachinename. Click Okay, save and exit.

On Server: (Where WSP file is present and needs to be deployed)

 Enable-PSRemoting
 Enable-WSmanCredSSP -Role Server
 winrm set winrm/config/winrs '@{MaxShellsPerUser="25"}'
 winrm set winrm/config/winrs '@{MaxMemoryPerShellMB="600"}' 

Click Yes/Yes to all till the dialog box appear.

Now Our System is configured for Remote execution of Powershell command.

Once, this is done, go to Client and run this command:

 $password = ConvertTo-SecureString "your password" -AsPlainText -Force
 $cred = New-Object System.Management.Automation.PSCredential("username",$password)
 Invoke-command -computername yourServerName -credential $cred -authentication CredSSP -scriptblock {Add-PSSnapin Microsoft.Sharepoint.Powershell –EA 0 
 Update-SPSolution -Identity yourfile.wsp -LiteralPath "C:\Program Files (x86)\(location of your file)...\yourfile.wsp" -GacDeployment} 

The above script will deploy our wsp file to Server.


 [1]: https://stackoverflow.com/questions/56497393/how-to-execute-powershell-script-from-server1-for-deploying-wsp-in-server2