I'd suggest there are multiple factors at play that result in an answer of "it depends".
1. Is the battery/company supporting the Defense or the Attack?
2. If in the Defense, with caissons dropped it would make sense to move the limbers and horse teams to a protected (reverse) slope - yet close enough to move forward, should the guns need to be moved back.
3. If in the Attack, will the battery/company be A) firing over the heads of attacking troops or B) moving forward by bounds with the attacking troops? A) would dictate something similar to 2. while B) would dictate the horses and limber be far closer.
This is over-simplified, but y'all get the jist.
For those with 20th/21st century experience, it seems that METT-TC sorta guidance is in play.
en.wiktionary.org