I got the screws (M2.6 x 0.45) for the SIGNAL I/O connector of TOS9300 series, as stated in the user’s manual. If the screws didn’t correctly fit in the connector, what should I do?

We are sorry but the previous user’s manual contained the incorrect information about the screws.
Please use the #4-40UNC inch screws.
For the details, read the Errata of the user’s manual.
Note: The user’s manual was updated in April 2021, including the Errata.