click modpack options then click open and then open the file that says Cedar's server pack open the folder that says mods and copy all the contents to the other mods folder in the main modpack folder.
Install Cedar's Server Pack
Step 1
Installing a modpack using the Technic Launcher is easy. If you don't already have the launcher downloaded, visit our download page to get the latest version.
Step 2
Type in the modpack name (Cedar's Server Pack) or paste the following url into the search box.
Step 3
Finally, click Install at the bottom right of the launcher after you select Cedar's Server Pack from the list on the left. The launcher will handle everything else!