The Jumpers are labeled as follows;ID0ID1ID2ID3 MTR: RMT-StartDLY: Start delaySYN: SynchronousLED: LED The item's picture shows both sides, to the left is the CU80 side and to the right is the DM68 side. The jumpers are on the right side of the DM68 side. ID0 is on the bottom. Imagine rotating the item picture clockwise to make the images below.