Hardware desing is the same as for terrestrial-only modules. Regarding BG770A-SN NTN documentation see BG770A-SN documentation.
If you want to set the position manually, you can use AT%NTNCFG="FIX",<lat>,<lon>,<alt>,0 on BG95-S5 or AT+QCFG="ntn/pos","stat",<lat>,<lon>,<alt> on BG770A-SN.
But there’s more to configure for the connection to work.
AT+QGNSSINFO is for CC660D-LS module.