Yes, it is possible to use the 31267 Line input transformer inside the TransDrive, and there are holes already in place to mount it.
However, your level will be lower since it’s a 2:1 winding so the levels with the ratio selection would be:
PRL/SERIES = 0dB (2400/2400 ohm)
SERIES/SERIES = -6dB (10k/2400 ohm)
SERIES/PRL = -12dB (10k/600 ohm)
And the secondary must be loaded with either a 619 ohm or 2400 ohm resistor across pins 7 & 10 for the above input impedances. We can set this with the Zobel setting so you have the option of unterminated (no load) or loaded.
I would prefer 2400 ohm load on the secondary which would make the transformer ring a little more and the SERIES/PRL would give you a 40k/2400 ohm impedance