[This answer](https://space.stackexchange.com/a/38761/12102) has astronauts entering a vertically oriented Space Shuttle for a Terminal Countdown Demonstration Test (TCDT) while [this answer](https://space.stackexchange.com/a/38784/12102) has them entering the shuttle when it is oriented horizontally for a Crew Equipment Interface Test (CEIT).

So somehow the shuttle had to be designed to allow people to walk in in both orientations and get to any of the seats and sit down while wearing a space suit and possibly gloves, presumably with some assistance.

**Question:** How did that work? What were the paths an astronaut took from entrance to seat in each of the orientation? Where were the footfalls placed in each case?