Guardian Module Blueprint Fragment, Guardian Power Cells, and Technology Components
Hitch a ride on a Fleet Carrier or start Hyperspace Jumping to the Synuefe NL-N C23-4System and once there, head to the Planet Synuefe NL-N C23-4 B 3 and use your Detailed Surface Scanner on it, locating the Guardian Structure, and landing as close as you can to it. Disembark on your Scarab SRV and head to the Ancient Data Terminal as well as the six other Energy Pylons located in a multi-triangular pattern around the site (one of these will be right next to the Ancient Data Terminal).
The Energy Pylons with come out of the ground when you drive close to them, and will have a glowing orb inside them that can be shot with the Scarab SRV's Dual Plasma Repeaters. This will charge up the pylons and begin a countdown and you will know it's charged by the loud bang you hear after shooting at it (there will also be a subtle ray of light going upwards). You will have to charge up all six pylons before the timer ends or it will reset and you will have to try again. Until you get accustomed, it is advised to drive around and take out the Guardian Sentinels (collecting their dropped Guardian Materials), Scan the active Ancient Obelisks with your Data Link Scanner to collect Guardian Encoded Materials, collect at least one Ancient Relic (from the top of one of the straight and skinny towers; shoot it down), and collect your Guardian Materials from the Destructible Panels (slanted towers; shoot at them) prior to beginning. The more Guardian Materials you collect now, the less you may need to unlock any additional Guardian Modules you'd like during Mission Objective: 18 - Unlock Guardian Technology Modules.
When all six pylons have been engaged, return to the data terminal and you will see a triangular slot illuminated in the ground. Park your Scarab SRV directly over the triangular hole, as close to the center as you can. Abandon or Jettison the Ancient Relic, and if you were in the right spot, you will hear an insertion. An orb will begin floating out of the data terminal for you to Scan with your Data Link Scanner to receive your Guardian Module Blueprint Fragment.