Yeah that's it
I think about a year ago I talked about this with Oliver and he said they discourage it. Started to do some research now, closest I could find was the key import. https://docs.lightning.engineering/lightning-network-tools/lnd/key_import
Discussion
Thanks, this guide also has some more info, though that seems to be a bit older. https://www.lightningnode.info/technicals/restorelndonchainfundsinelectrum