You can obtain four collectibles and complete the three Challenges in the first playthrough of the Endor The Line mission. So, this means you have to come back in Free Play for the last remaining Minikit.
Everything in the mission can be done pretty fast if you know what you must do precisely.
Therefore you should check the guide below if you don’t want to waste any time collecting the five Endor The Line Minikits.
Minikit #1: Geejaw And Order
You start the mission on a small hill with a bunch of scout troopers below.
Get rid of all the mobs without getting down from the high ground.
Now that you are not underfire anymore look up to spot three red birds flying around.
Shoot at the birds, and when you destroy the third one, you’ll receive the first Endor The Line Minikit.
Minikit #2: Endor-Tainment
After getting the first Minikit, you can go downhill but avoid the current mission objective, for now, so don’t get on a speeder bike.
Instead, you want to go to the west of this small area to find a couple of boxes.
One of the boxes is indestructible, but you can smash the other chest without a problem.
After doing so, use the remaining pieces to build a terminal connected to the indestructible box.
Now look for a cage hanging from a tree near the box with the terminal.
Switch to a Villain character or disguise Leia as one if you are in Story Mode and throw a grenade at the cage.
Get the keycard that fell on the ground and put it in the box’s terminal to obtain Endor The Line Minikit #2.
Minikit #3: Littering
The next collectible is located on the north side of this area, past the speeder bikes, near the big tree on the right.
As you can see in the following image, it’s there in the bushes.
Destroy the small green object standing in your way and collect the third Endor The Line Minikit.
Minikit #4: Heavy Sleeper
The fourth collectible is the one for which you need to be in Free Play because you have to use a Scavenger character with the Breaker Blaster unlocked.
Now that you switched to a Scavenger, go to the area’s south side and find a small cavern with the entrance covered by a breakable wall.
Equip the Breaker Blaster and destroy the wall to find the fourth Endor The Line Minikit, under a sleeping Ewok.
It seems that you can’t get the collectible until you wake up our furry little friend.
To do that, you have to destroy the two food crates from inside the cave and prepare the Ewok’s meal.
You are now free to collect the Minikit.
Minikit #5: Backseat Bonanza
You have to proceed with the current objective for the last collectible and get on a speeder bike.
In this second part of the mission, all you have to do is shoot at the scout troopers and try not to crash into the trees in the process.
At some point, you can see one of the troopers carrying Lego Star Wars Skywalker Saga Endor The Line Minikit #5 on the back of his speeder bike.
Shoot at him to get the last collectible.