Can't say for sure about your TT. I'd suggest locating the motor. If there is a manual retract it'll be with/next to the motor unless it's a schwintech slide mech, no manual operation. On the X23B it was under the sofa, found a bolt that could be wrenched to manually operate. Was told during PDI there was no manual retract. The 351 has 3 slides, one is a Schwintech, the other 2 have motors under the floor. Access from underneath. They require a ratchet To operate.
I suggest locating them even is a trip yo the dealer is required. I had to manually retract a slide on our 1st outing with the 5th. Not fun!
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks