Can't get the tenders on my USRA Heavy Mikado to couple.

I bought the Heavy Mikado to use with the RW&A and can place the engine and tenders, but the coupler on the tenders won't couple to anything.
The coupler on the front of the engine is okay and will couple up to anything I've tried so far. The coupler on the tenders just pushes through the coupler on the vehicle a person is trying to couple to.
I've tried multiple installs and redownloading the original zip. I enabled Brit-Kits for the RW&A in the upper right flyout.
The coupler on the front of the engine is okay and will couple up to anything I've tried so far. The coupler on the tenders just pushes through the coupler on the vehicle a person is trying to couple to.
I've tried multiple installs and redownloading the original zip. I enabled Brit-Kits for the RW&A in the upper right flyout.