If you haven't already, make yourself a Twitch.tv account and download the app here.
Once you have downloaded and installed the app, you can head over to the modpack page here.
Open up the CurseForge/Twitch App and head over to Mods then select Minecraft. You will then see a tab for making a new custom profile, select this.
You will see the window says you can import a profile, this will be the modpack which you downloaded so go to that location and select the zip.
The modpack will be ready to go, start it up. *Optional* To allocate more Ram to your client go into installations from the MC launcher, go to advanced and simply switch the 3000 or so mb to 16G or 32G etc... (Note: By placing GB it will crash, ensure to only name as G for GB)
Once you load up the game, simply add the server's IP which is as shown; 116.202.55.212