The latest version of the long clamp, partnr. 1631 has 3 holes in it’s body. The old version F7-02 did have 2 holes in it’s body, but is otherwise the same as 1631.
The now obsolete version of partnr. 1631 was 1631pl (plastic), see below.
If the metal clamp is modified as shown above it can be used the same way as it’s plastic equivalent: