Something: long, flat and slim….hacksaw blade, steel ruler, even a kitchen butter knife…?
Slide it in through the slot behind the seats until it hits the reel then jiggery pokery to try and rotate the reel backwards a little.

Doug
2011 Plus 4 in Rich Maroon

1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900