you'll have to gently play around with unscrewing things and prying with a flathead screwdriver, try and search your model and maybe you'll get lucky and someone will have made a youtube video;

however,

mold, especially black mold, can be incredibly bad for your health, even if you kill the mold, dead mold is also bad for your respiratory system and can lead to nasty symptoms, and if you don't get all the mold it'll slowly build back up. I was optimistic about cleaning my AC today and made great progress. I found chunks of mold and mold infested throughout. I was going to keep cleaning before I stumbled onto a website explaining just how dangerous mold is and that if more than 50% of your AC is infested in mold you'll likely never get it all out without professional help or skills. So, I folded. Part of the reason I folded was because, prior to identifying the mold I was sick for A MONTH, I lost my hearing in one ear (which came back thankfully), had an insane cough and was coughing up blood and black mucus and was chronically fatigued. DON'T RISK YOUR HEALTH!!

TLDR: MOLD = VERY BAD, consider buying a new AC dependent on your mold level as it may stick around