My Sherman DMD doesn't have the recoil option, but I would think that that if a plug exist on the TIGER DMD for a recoil, it would be quite simple. In order for the Heng Long recoil to work all it needs is one pulse of a current in the negative direction and you will be in business . Hook up a voltmeter to the plug, and find out which prongs delivers that requirement.

My Tamiya Sherman DMD elevation circuit could not handle the current requirement of the Heng long recoil motor, and It failed in one direction. THe recoil unit must draw more amperage as it is working against a fully extended spring to start the proceess. The Tamiya electronics that hande the gun elevation could not handle the load. In hindsight I should have tried this on an unloaded motor first.

I would think that a DMD with a recoil outlet probably is engineered to handle the load. When experimenting though, that is the risk you take. Just try it with an unloaded motor first, and you should be fine.