How can I get continuously spawned AI to follow the previous spawned one?

Firstly, I’ll just say that what I’m trying to do is set up a version of snake but with 3D models following behind my first person player character. I have been having problems getting the spawned AI to attach at the end of the line. I have gotten them to spawn every time I hit a sphere, but then they just stand there. I’m pretty sure that I can set it up with an array, but I’m having a hard time updating the array every time a new one spawns.

Bonus, if anyone has a good idea how I can get them to spawn directly behind the previous incarnation, instead of a dedicated spot.

NPC_AI_BP

Node_BP

Forgive my ignorance, for I am but a newbie.

Thank you in advance

I should also mention that I can get placed AI to follow me just fine.

I also know and have fixed the break between the array and set value as object bits of the NPC_AI_BP screenshot.