GP40-2, GP402H-2B and Clinchfield SD40 to use SS 16-645E3

Hi All,
What is the process of changing the GP40-2 and the NJT GP40H-2B to use the Searchlight 16-645E3 sounds and light flares?
Also tried the same with the Clinichfield SD40 to no avail.
Anyone got any step by step guide as I'm a noob.
Cheers
What is the process of changing the GP40-2 and the NJT GP40H-2B to use the Searchlight 16-645E3 sounds and light flares?
Also tried the same with the Clinichfield SD40 to no avail.
Anyone got any step by step guide as I'm a noob.
Cheers