Check the cut
Remove the boards from the clamps and set them up on the bench to check the cut. When the edges are put together there should be a very small space between the two boards in the middle section.
Dry fit the boards together at the clamping station
Position the boards together at the clamping station. Consider using a piece of cardboard under the panels to contain the glue. Clamp the middle section of the boards together first. The outside edges should be sprung together nice and tight.
Use your finger to flatten the bead of glue across the edge
Spread the glue along the entire edge of the board. Try to keep most of the glue towards the inside of the edge, rather than simply mushing it down.
Clamp the boards into place
Place the boards down and position the edges together. Tighten the middle clamp first. Check to make sure the boards are flat and face is flush. Tighten up the outside clamps. Allow the wood to dry for the prescribed amount of time.