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1. The screw holding the P&CB cannot be in the way of the fiber optics (FO) connector
2. The screw fixating the FO connector bumps the P&CB! . A screw with a depth no larger than 0.216 inches should be used excluding the screw head depth (fiber optics component (0.156 inches) depth + depth of detector cover 0.06 inches 
3. The screw fixating the FO connector near the lateral side does not have a hold hole all the way through. A screw of 0.216 inches should also do.

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FO cable is fragile and needs fixation in a more elegant form. Now fixed with kapton tape

26-db connector holes

The screw fixating the FO connector near the lateral side does not have a hole all the way through

Image Added