I have some of these PCB kits that I created to allow you to easily add an R2LC or R4LC to a dummy locomotive and control lights, couplers, smoke, and sound under TMCC command control. The kits consist of the PCB, the 24pin connection header, and the five .01uf caps. Kits are $2/ea, and shipping is $5 for one or many.

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Dummy Locomotive Board Kit Contents
Dummy Locomotive Boards N2

Here is what a finished kit looks like. Needless to say, the R2LC does not come with the kit for this price, it's just shown to illustrate how the kit is used.

Assembled Dummy Locomotive Board
Dummy Locomotive Boards N3Dummy Locomotive Boards N4

Kit with R2LC installed.
Dummy Locomotive Boards N5