Apologises
@Frank I thought it was the current instructions I'd used previously, should always read the post before sharing the link.
Grabbed a couple of quick screenshots
When you initially log into the server you should be presented with this screen
View attachment 167395
On this screen click "Network Settings"
View attachment 167396
and then select Spectate ON then back
The game automatically moves to the next screen "Car Selection" after a few seconds when you initially join the server, if this occurs prior to you having a chance to hit network setting, just click the back button.