Bachman Christmas Trolley made for Dillards Store

[donby1]

I would like to replace the motorblock in an older Dillards Christmas trolley. The track has magnetic buttons on two pieces that reverse the direction. There is a small piece that is attached under the block that has pos. and neg. wires to it. I believe this is what reverses the trolley. So, will a standard streetcar motorblock work as a replacement if I attach the afore mentioned piece under the new block? Thank You