Every fingering that fits a hand
x323
easy · no 5
8686
hard · no 5
8a89
moderate · barre
868x
easy · no 5
8689
hard · no 5
What is true of it
D♯m6 is D♯, F♯, A♯ and B♯ — 1, b3, 5 and 6 counted from D♯.
These are also the notes of Cm7♭5/D♯. Which name is right depends on what is underneath and what came before — the notes alone do not decide.
On an instrument that cannot reach all 4, the 5 goes first, in that order.
The easiest of the 5 fingerings below is x323: 3 fingers, held at the 2nd fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
1 of the 5 need a barre.
It leaves out the 5. 4 strings cannot carry 4 notes, and the 5 is the one this chord can lose without changing what it is.
1 string stays silent.
Where its notes are on the neck
The brass dots are D♯, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
D♯m6/F♯
x686
D♯m6/A♯
3323
D♯m6/B♯
5666
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.