No problem...you posted back before I could finish up on the prior reply but...yeah...the bottom tail gate isn't that hard to open manually.
When you go out to check it out...if you lower the the bottom half...the top panel (the one closest to the interior) can be flipped up with your fingers...try at the edges (start in the middle where the two protection pieces meet). Nothing really secures it (which was surprising when I tried it)...then just follow the manual's instructions.
Thank gawd I had all this time on my hands...football and snow...I'm going to dread tomorrow morning...it's still falling and it's about 8" more on top of 8" that fell New Years Day...and by morning the temp is suppose to drop from what it is now (approx 30°...to -12°. I probably need to suit up and knock some of it down while it's still close to 30°.