Not really needed as I though I need to scour the map for the spawner like the 4th boss but turned way more easier than that, I decided to scout big piece of land next to where we built out base.

I usually scout the boarders to see how big the island is before giving it a go & it appeared to be it, what give it is that the water distancing the island is very short with other big pieces of land on our map are usually separated by huge sea.