How is the R232 interface assigned?

In the instructions for the Secutest S2 and Secutest S3 and Seculife ST HV, the pin assignment is shown as follows:

This is the assignment of the connector. However, there is a socket on the Secutest variants!

Therefore you have to look at the pins and count them:

top row, left to right: pins 6, 7, 8 and 9
bottom row, left to right: pins 1, 2, 3, 4 and 5