Hello! These are the photos of the package I was able to get. So, I think it's two round ends :) But does this help to find out the model? Do you think this one would be compatible? https://www.slotfun.de/Stromversorgung-Zeitmessung/Rundenzaehler/-Zeitmessung/Carrera-analog/Carrera-Excl-Evo-GO-Elektronischer-Rundenzaehler::1420.html?MODsid=ke41g81gsg1bkohm763uojhcd3 Thank you a lot!