The following schematic shows how to connect the universal #receiver UniRec1 or UniRec12 to a Berner GA103 or GA203 or GA403 #garagedoor controller. The same for Hoermann motor drivers.
UniRec1 and UniRec12 are very compact and permit to open those automations using almost any #handsender in the market, fixed and #rollingocode , AM and FM.