First Degree NEPTUNE Challenge AR Owner's Manual page 17

Replacing the bungee shock cord:
Pull Bungee
through until
seated securely
Reinstall the shock cord through the upper frame, along the opposite side of
idle wheel, through the mid frame and lower bungee pulleys and then tie off
with plastic tie wrap to correct tension. Replace frame plug
Tip: Correct bungee tension is achieved when enough recoil is present for the
rowing handle to easily reach the front of the rower pulley belt bracket at the
far front of the frame. If the rowing handle will not reach rearward to the end
of the seat rail, the bungee cord is over-tightened and will require adjustment.
Bungee shock
cord
Bungee attachment
point