While snooping around the stock init script, I spotted a variable, home, in the mountdata function standing out from the crowd. After doing some quick tests, the preliminary results are summarised as follows,
Prerequisite: The persistent overlay (.img, .aes or .inf) being on the same partition as the KNOPPIX file.
Functionality: Loading a specific persistent overlay at the boot time.
Usage: knoppix home=/mnt-system/foobar/dummy
*The dirname and basename cannot contain any whitespace characters.
*The basename needs to be unique if there are more than one overlay files in the same folder because the suffix cannot be part of the argument.
Samsung Galaxy Tab A9 (X110) 64GB 4GB RAM International Version (New)
$129.99
Samsung Galaxy Tab A8 10.5" 64GB Gray WiFi Tab SM-X200NZAZXAR 2022 Model Bundle
$130.00
Samsung Galaxy Tab A 8" SM-T387V 32GB Verizon Tablet (No SIM Tray) Grade B
$31.99
Samsung XE310XBA Chromebook 4 11.6" w/Celeron 1.1GHz/4GB/16GB SSD - Used
$38.00
NEW Samsung Galaxy Tab A8 10.5-in 32GB Tablet - Gray SM-X200
$129.98
Samsung Chromebook 2 503C XE503C12-K01US (Octa 5420 1.9GHz - 4GB RAM - 16GB SSD)
$17.92
Samsung Galaxy Tab A9+ 11.0" 64GB Gray Wi-Fi Tablet Bundle SM-X210NZAYXAR 2023
$170.00
Samsung 8.7" Galaxy Tab A7 Lite 32GB Silver SMT220NZSBG Book Cover Bundle
$69.99
Samsung Official Book Cover Keyboard Slim for Galaxy Tab S9 / S9 5G - Black
$87.95
Samsung Galaxy Tab S9 FE SM-X518U 128GB, Wi-Fi+5G (Carrier Unlocked) 10.9"- Gray
$409.98