Starting without the drive upper on?

[CC25]

Just finished the plug/wire change and would like to start the boat. Don't think we'll have a freeze again either. I'm waiting on some o-rings for the upper/intermediate section re-install, so thats not on yet. Jackshaft, Volvo DP-D drive set up. Can I hurt anything starting the boat without that on? Don't think so, but..........

Anyone?