Bellbox Wiring help

[Olly A]

Hi any help gratefully received.

Attempting a DIY replacement of old house alarm with Pyronix Euro 46 V10, hoping to use the old bell box as appears to be working (not sure of make/model). I have following terminals in the bell box:
STB -
HOLD OFF -
HOLD OFF +
RTN
TRG

Euro 46 has:
STB
BELL
TR
B -
B +

Am I right in wiring following:
HOLD OFF - > B -
HOLD OFF + > B +
STB - > STB
TRG > TR

Or am I completely wrong? Thanks

 

[Bigsosij]

TRG > BELL
RTN > TR

 

[Olly A]

Thanks will give that a go