First Degree NEPTUNE Challenge AR Owner's Manual page 15

Rower handle
Belt/Bungee
pulley
3. Wind the rower belt onto the belt/bungee pulley un-
til the rower handle is as it's furthest forward position.
4. Rethread the bungee shock cord (on opposite side of
the idle wheel) back through the bungee pulleys and tie
off at the attachment point.
Hint:
If bungee shock cords previous tension seemed correct (a
good way to judge is if the rower handle can make it to the
furthest point forward on the top of the mainframe under
bungee tension alone) then simply tie off at previous position.
If the return is too slack, experiment by tightening the tension
in small increments and testing until the correct tension is
achieved. If the rower handle cannot reach the end of the
seat rail during a rowing stroke, then the bungee shock cord
is over-tensioned.
Bungee pulley
Bungee shock
cord