There are 2 Lynx stops at DTD.
One is at the West Side bus depot, which is behind La Nouba. Disney buses don't go there, just Lynx & a few outside hotel buses.
The other is a street stop on Buena Vista Dr., behind & across the street from the toy store at the Marketplace. There is a small shelter, but it only holds a few people. Sometimes there's a small crowd around it in the morning.
That stop is a 5-10 minute walk from where the Disney buses stop, because you have to exit the Disney stop at the far end and walk around it. I think it's slightly shorter to take the crosswalk across the lane the Disney buses enter the loop on, then another crosswalk across the exit, and walk on the sidewalk along the street towards the toy store. When you reach the corner, continue across the crosswalk straight ahead (towards the Hilton), and you'll see the Lynx stop maybe 100' down the block towards the right.
Bear in mind that bus service from resorts to DTD may not start until around 8:30 a.m.