Yeah, surface shields for ships of that size for now. We could add shield meshes later if we get the ability to, for example, actually use different meshes against different weapons like a bigger shield mesh against turbolaser fire and surface shields against small lasers. The old corvette still has a big lame shield mesh on it but it's not exactly a model example of how we should do things.
Also, are those modelled tractor beam turrets? If you finish those then it'd be great to have them to replace the flat panels, since even if we don't have working tractor beams yet we probably will eventually, and in the meantime those would act as nice extra detail. So, to clarify, if you're making those turrets then please make them as functional as the rest; we'll just disable them in the tabling until we have working tractor beam weaponry to put on them. Also, if it's difficult to incorporate those to replace turret31 and turret32 (since they're shaped a bit differently), then we can probably skip those two since three tractor beams is probably plenty enough considering that their use is likely going to be almost exclusively FREDded on a per-mission basis.