Spiegel Grove engine room access

[DanMacLeod]

I'm looking for the most direct route into the Spiegel Grove's engine room. I've been looking at YouTube videos to try to find the best way. The best I can tell is to enter the Spiegel from the starboard side just below the medallion plaque. From there, it looks like you drop down three levels to the engine room. What I'm not sure about is, after dropping down one level, which hatch to go through for the next level in relationship to the first hatch. (i.e. is it forward or aft, and by how far). Before you ask, yes, I'm a tech diver with Advanced Wreck diving experience. I have about a dozen light penetration dives on the Spiegel and looking for something new to see.

thanks

Update 9/23/2015 - Found an entrance about mid-ship on the port side.