The transition from a CableLinks to a trumpet is not direct.  You essentially have to convert back to a WaveTrax trough connection to add the trumpet.  The transition for a 4" trumpet to 4" CableLinks would look like:
 
027-0000-4000 (CableLinks) to 027-2000-4090 (Trough Adapter) to 027-2000-4099 (Coupler) to 027-2000-4009 (Pin Adapter) to 027-2000-4075 (Trumpet).