1977 evinrude 115hp control box help

[bleevb]

I am looking for information on how to remove the cover housing on a 1977 115 HP Evinrude remote control. Best I can tell I have all the screws off. It seems to be pressed on perhaps to the shift/throttle plate. As the cover looks like it is cast aluminum I don't want to pry on it too much. I am able to get the bottom part of the cover off but the top won't come off. Any help or direction would be great. (I am in the process of changing out my gear cable and need to gain access to remove the old cable)
Thanks in advance.

[boats.net]

almost all control boxes split in half, it is hard to say what style you have or what the hang up is.

[bleevb]

It's a 1977 evinrude. Any screws that I might be missing?