DT Swiss 240 hub end cap compatibility?

[ridethecliche]

Hi!

I bought 2 sets of wheels recently with dt Swiss 240 hubs. They're both currently set up as 12TA in the front but my bike is currently 15TA.

I bought a set of adapters but they look different and I think then might be for the 350 hubs. Are they not interchangeable? Just wanted to make sure so I don't break these nice wheels!

Thanks!