I think this topic is also addressed in this post, but it doesn't address how に works outside of contexts where the speaker is trying to "trying to think of/recall things". I'd like someone to explain how に is used conjunctively in objective contexts. I've seen examples of sentences where に is used conjunctively when the speaker is narrating a story, which (I think) it wouldn't make sense to think that the narrator is "trying to remember" these nouns.
One example I found in a book I was reading is:
The store that Lawrence and Holo entered was a small inn combined with a bar.
I think I might be reading this wrong, and the する after 併設 is just omitted in this sentence. In that case, I assume に is just marking the object of the する verb.