Please, tell me it's not too late!

My son and I are just about ready to test fire his slant six and see if all systems are GO. Then it dawned on me, when we went to Wallyworld to buy all the various and sundry fluids.

We took a list of all the fluid capacities from the Haynes manual.
Let's see...transmission - 8 qts. Dexron II or Mercon.
Wait a sec., does that include the torque convertor? Holy moly! (here's where it hit me) How do you fill an empty torque convertor - after it is already installed? The tranny was rebuilt, picked up dry from the shop, and installed.

Please tell me we don't have to pull the transmission to do this.

Jerry