You should be able to put the cable in the front mech hole on the frame. Since it would exit out on the bottom of the frame right before the bottom bracket. Just like fujitasummers did, by zip tying it up the seattube. Not really certain that you can run it through the bottom bracket area. When I replaced the bottom bracket, I did not see room to do such a thing. Although, I didn't buy this bike for riding that would require a dropper post.

Was a good bike though. Enjoyed tearing it apart and rebuilding a few years ago. Couldn't get a hold of the bike I wanted, a Trek Roscoe in 2021. My son had a Scale at the same time as I had the Aspect. The Scale was a lot more fun to whip around on, easier to get up to speed, corner and jump. The Aspect fit me better and felt it would have been a good bike for bike packing, since it was more comfortable and great for longer distance riding. My son didn't enjoy his Scale when we went for a 20 mile ride one day just because it wasn't as comfortable. But the shorter rides, the Scale was just so much more fun to ride up and down hills.

We both sold the hard tails over a year ago and went FS. Trails around where I'm at are just too rocky for hardtails. But will admit, am missing the hard tail and am eyeing up trails elsewhere that are not so rocky. Perhaps a Roscoe is in my future? Good sales going on, or good prices on slightly used bikes now.

My highly modified Aspect 950, which is not much different than the 940: