03 kx250 shock bleeding

hey guys just in the process of changing my rear shock oil, but if hiut a dilema all the shocks ive done in the past have a bleed screw right in the top so id normally bleed it put it together then flip over bleed the last bit at the screw then preasurise the bladder but i cant do this now so how do you guys do it????

i cant find a workshop manual for the bloody thing either so help here would be great!!!!!