On the subject of the small Huawei equipped cabinets, I attach three images taken of one that I came across last autumn. At that time, it had not been commissioned and was not powered up.
On the front door, the locking bolts are of what I call the "star" heads. (First picture.) On the right-hand side door, the locking bolts are of what I call the "triangular" heads. At the time I inspected it, the right-hand side door of that cabinet was not secured. Hence the internal view from the right-hand side showing the fibre feed and the tie-cable banks then without the low-pass filters in place. (Second and third picture.) One final point to note is that the security lock, securing the front and the right-hand side doors together, had not then been fitted. The security lock is visible in the picture that nick9one1 provided, above.