Opening tender sound value 2-6-0

[Mixed Train]

Having trouble removing the tender body from the chassis on a sound value 2-6-0. I removed the two screws that hold the wiring harness at the front of the chassis but it seems to require too much strength to lift the front of the tender upwards so as to disengage the tabs at the rear. Trying to post photos but they are over 350 kb on my android phone not sure how to " shrink" them.

Update --Found Jan's helpful post under Alco 2-6-0 that alerted me to a hidden black screw underneath the black wiring when I remove the harness.  Now I just need to know how to connect a keep alive under the coal load!