Setup btcpayserver-docker with the opt-add-ltcmweb
fragment.
Install the plugin (or restart BTCPayServer if already installed).
Add MWEB View Keys to Litecoin MWEB Wallet settings in BTCPayServer admin.
They can be retrieved using Electrum MWEB (release-9 and later).
One question out of this, actually -- for the view keys, we should copy and paste both view keys in the MWEB settings, correct?