I opened up my blower motor when I replaced it. Apparently they thought some felt would retain enough oil around the bushing. It was a replacement motor and worn silly.
The felt was just dust. Lubing it would have had is screeching in no time and a lot of effort spent in its extraction, lubing and replacement.
The new motor has the same design, I assume. It's red and black wires were reversed, unless red is ground and black is hot in whatever country manufactured it.
I seriously fattened up the ground wire and wiring from the speed selector switch and eliminated unneeded connectors, and it moves more air on medium high than the old motor could move at highest speed, for about 5 less amps consumption. Highest speed is about the same amp draw as the old motor, but it spins so much faster.
The bushing on the domed end would need a hole drilled to get oil on the felt lubricant retainer.