Aircon leaking indoors, clean drain from inside?

In previous places i would just use a suction thing on the outside of the drain but i just checked and i don't see the drain at all, maybe it's in a conduit or something i think, anyway does anyone know if there is a way i can suction or clean the drain from the interior unit? Also does anyone know what this red thing is outside?
Also why there is a rigid green wire here?

by disastorm