Further to my previous reply, some additional information for improved anti-stalling point performance that you are enquiring about, based on Peco electrofrog points.
Here is Peco datasheet for an electrofrog. This one happens to be a concrete sleeper code 75 rail version, but it does have a good close up photo of the OPTION 2 modification needed to convert to switched polarity frog working and connectivity to the point motor polarity switch. The mod is the same regardless of the Peco electrofrog point model.
On the datasheet photo there are two positions labelled A & B. Position A is where the factory fitted links that need cutting are located. Position B is where optional wire links (HIGHLY recommended) are positioned to improve electrical reliability - these position B links would needed to be soldered in by you as a local pre-installation modification. Note also, the two arrows on the left hand side indicating the position of insulating rail joiners. Do not miss these off, they are essential for correct working. The insulating joiners shown are SL-111 for Code 75 rail. For Code 100 rail you will need SL-11 joiners.
Where the point has already been laid and fitted then it is very difficult to perform this mod retrospectively. As said before, it is best performed at time of installation. I have performed this mod on all my Peco SL-E** points, so any further questions do not hesitate to ask.