Heating and Ventilation

Have recently changed the Alternator and subsequently had to unbolt and move the AC compressor. AC 134A charge went to zero. Is it possible that moving the compressor stressed the AC lines and I should replace because of age? Or should I look at other reported AC issues? Thank you

On replacing battery in my 1996 Carrera 4 Cabriolet, notice a disconnected hose (central vent?) on
floor beneath spare wheel. Unsure of connecting sites. I found one clear hose to connect one end but
nothing else free to connect the other end...............any suggestions.

Thanks !