Tower of Zot controller.

[Atamis]

And where was this "explicitly stated" or otherwise implied?
I see how they could potentially do that, but it seems odd to broadcast Anima through some towers while summoning anither primal to defend it. I presume this also means Anima itself must have some sort of physical link to Varis otherwise this seems contrived.as Yasayle was the only primal to really require a physical body, discounting Zenos stealing Shinryu.

[Yukijin]

And where was this "explicitly stated" or otherwise implied?

It's mentioned either on the diner scene or on the moon transporter scene (or both) that

(...)they just dismembered Varis's body so Anima could project its influence through the tower network from Garlemald.(...)

and due to this they can send from those extra towers Aether back to Babil so they can have enough energy to break what remains of the seals of Zodiark and, if I'm not mistaken, allow them passage to the moon.

[Cilia]

And where was this "explicitly stated" or otherwise implied?
I see how they could potentially do that, but it seems odd to broadcast Anima through some towers while summoning anither primal to defend it. I presume this also means Anima itself must have some sort of physical link to Varis otherwise this seems contrived.as Yasayle was the only primal to really require a physical body, discounting Zenos stealing Shinryu.

Fandaniel / Amon tells us during the "dinner" scene with Zenos.