I see that as more of an aesthetic question. Is there a higher-up who'll object to the current method you use? Personally, I only use short cables when I know I'll never need to move them again or ...

I think you mean SC/APC. It almost surely is single mode. OS2 should be fine. The other measurements probably don't matter as long as you get OS2 single mode with SC connectors with an APC polish on ...