I wasn't certain what the OP meant so I listed the connection order in case they weren't sure. Not everyone is technical.
If not powered up, the connection order doesn’t matter at all. When all is connected, power-up; start at source(s) first, then preamp, then power amp(s).
If not powered up, the connection order doesn’t matter at all. When all is connected, power-up; start at source(s) first, then preamp, then power amp(s).