With him and Gomez fighting each other, I would put Trent in midfield permanently.
I think Trent and Conor will both play RB until the end of the season, we'll probably have midweek games almost every week for the rest of the season, assuming that we progress in Europa and FA cups. I don't think Jürgen will move Trent into midfield this season although he may get a few more 30 min cameos at the end of games
That is assuming we have plenty of fit midfielders, if there are a few injuries in MF Trent might get moved there to cover.
Gomez may get more games playing at CB or LB for the rest of the season.
The longer term decision will probably be for the new manager, how will these 2 players fit into his style of play? The new man might decide to move Trent to midfield or maybe use him as a wing back if we play with 3 CB.