i'm gonna have to agree with jim. You need a long funnel, stick it in the dipstick hole. Begin to fill it up and check it with the engine running. Make sure you go through the gears with the engine running. This will allow fluid to fill some of the chambers.

MT, you just take out the speedo gear and fill it there. Checking them is a PIA cause you have to stick the speedo gear back in the tranny and pull it out again to see if its full or on the gear itself. This is a PIA cause they generally don't fit in and out with ease.