What to do?

This here is a project i started about 3 years ago.

Its the back half of a Space 1999 Probe Ship, the front half being an Eagle nose cone and other bits and pieces.

I gave up because i realised that the roundness of this section was clashing with the angles of the Eagle section and the two just weren't gelling.

Still like this bit so i've dusted it off and decided to finish it.

But what to do with the left hand end?

Do i have it as the engines, so the right hand side is the crew area? Or make the keft the crew bit?

If so, what will it look like? Was toying with a 2001 Discovery-type ball but don't think that's look right.

And the bits box is turning up blanks...