I got a new 3 axle USA motor block. It fits fine in some side frames I got off ebay. The block has a pivot axle in front and some skates to do the electrical pickup. DOes it pickup power also through the wheels? Maybe not, since it has those darned rubber traction tires. The front pivoting axle does not have the tires though. I've never dealt with traction tires before and am not too familiar with them. The side frames had some wires that seem to pick up power from the axle ends. On the back of the motor block are two holes with something in them, is that power pickup also? Would appreciate any shared advice.