If it has more than one cable I'm surprised. It usually has one positive cable and uses the mount as a ground. In the case of there being two cables don't know.
Bolt the starter into the starter position. There will be three starter retaining bolts. Connect the cables to the front of the starter.
Place the starter into the starter position and secure it with the starter retaining bolts. Connect the starter cables to the front of the starter.
Disconnect the positive cable from the battery. Disconnect the cables from the starter. Remove the starter retaining bolts. Pull the starter out.
Remove the starter cables. Remove the retaining bolts. The starter will come off. Reverse the process to install the new starter.
Begin by removing the positive cable from your 1998 VW Jetta battery. Remove the cables from the front of the starter. Remove the starter retaining bolts. There will be three starter retaining bolts.
Remove the cables from the starter. Remove the three retaining bolts from the starter. The starter will come out. Reverse the process to install the new starter.
Remove the battery cables from the starter. Remove the retaining bolts from the starter. The starter will come off. Reverse the process to install the new starter.
Bolt the new starter into place with the retaining bolts. Attached the cables to the cable posts on the end of the starter.
Remove the starter cables. Remove the starter retaining bolts. The starter will come off. Reverse the process to install the new starter.
Remove the cables from the starter. Remove the starter retaining bolts. The starter will come off. Reverse the process to install the new starter.
Secure the starter by tightening the starter retaining bolts. Connect the cables on the front of the starter. Connect your positive cable to the battery.
disconnect battery. remove cables at the starter. remove starter mount bolts. remove starter. replace starter. reinstall bolts. reinstall wires. reinstall battery cable.