9 times out of 10 they are not used correctly and the cable is not crimped firmly, most other connector types reduce the cross sectional contact area hence the resistance issues.
Soldering and heat shrink is where it's at...
It's an old ADT box, pre merger between Thorn and Modern when they went with the Elmdene Rapier for their HS applications. Batt shows 1993 so well before the 1997 (ish) merger.