How to upload/import an externally managed CoA for the GL

To preface, I'm new to inbound Lawson GL technical integrations. I've sourced from it plenty of times but never wrote into it.

We are looking to upload an externally managed Chart of Accounts to Lawson as a regular business process to keep various GL systems (not all Lawson) in synch with corporate mandated "common CoA". We can create pretty much any format, parent/child, generational, xml, etc but can't find any documentation of how this is done for Lawson GL. Is it as simple as just writing to the underlying tables directly or is there an import utility for this? We are NOT loading data, this is for the CoA structure like accounts, entity, etc.