Here are some word suggestions (for referring to a trans man's genitalia) from me as well (in case they're still needed):
"Vagina/Pussy"= (front) hole, things with man or boy in front of them like mancunt or boypussy, just cunt is also fine (but just "pussy" is pretty iffy for me personally, better with man- or boy- in front of it)
"Pussy lips/slit"= honestly have nothing for that, since I never use that part of my body. Also a tip: would be cool for people with two holes to have the opportunity to only use one, since I'm one of those people that can't use the front (for reasons of dysphoria and physical discomfort) and only do anal.
"Clit/bean"= dick, cock (there are a few more but those are the ones I use and I see other trans men use most of the time)