OP,
Don't get distracted by cause or blame. Right side up, down doesn't make any difference.
Remove the woofer, the crossover parts are usually accessible from there. Some glue dried out, ... or they landed hard along the way. Thankfully no other damage.
And, btw, you do not have to 'fix them' if they are stable when in position and sound terrific. The now loose parts/crossover board have settled somewhere.