At the KC, Hector was joined in the Tigers' defence by fellow Chelsea loanees Ola Aina and Fikayo Tomori.
"I played a lot," Hector told chelseafc.com. "The season was not as expected for the team and if I am honest, it was up and down for myself and the team was quite low on confidence. It was a bit patchy but if now I have a good pre-season, I can knuckle down and see what happens from there.
"Germany is a tough training programme but it is one game a week. In the Championship there are so many games you are playing with knocks and bruises the whole way through.
"Ola and Fikayo both did really well, positive in what they did, and I enjoyed looking after them."