2 pieces of ICF152 oplev viewport windows were installed to EYA; they are at the level of the main beam; the serial numbers of them are S/N0030 for -X side and 0031 for +X side.

The torque: started with 5Nm, then 10Nm, then 15Nm for ICF152 part; the small screws part (for fixing a glass), the exerted torque was limited less than 5Nm.

Fig. 1, 2, and 3 shows "-X" side. You can see an attached aluminum(?) mirror on a sapphire dummy through the windows.

And so Fig. 5 and 6 for "+X" side.