Legacy Alarm Wiring Confusion

[spammy]

Panel: Accenta8
Bellbox: Flashguard Xtra

 

While reading the installation manual of the existing alarm above, I came across the following:

The installer at the time kindly scribbled down his wiring notes and it is indeed wired as the above. I considered that this might be a printing error, except another table seems to corroborate it (this panel is at the top of the table and uses those TADB terminals):

When searching for similar wiring diagrams, they seem to be wired in the expected way, ie tamper and 0V supply switched.

 

My questions:

1. Does this matter? Does the 0V Tamper return behave the same as the 0V supply voltage?
2. Is the tamper return solely to let the panel know that the bellbox may have been opened (as opposed to cut)? If wired this way, is this behaviour lost?
3. If I wanted to test the behaviour at the panel end, what's the best way to go about it? What should I expect from such a test?

 

Edited 12 hours ago by spammy

[MrHappy]

1. ? its the same 0V

2. Removing 0v, opening lid on bell or cutting  is the same

3. At the panel end - touching the ov return to the bell trigger would make the bell ring