This model is compatible with the z-axis support and spool holder linked in the remix section of this description. It replaces the foot mount right behind the screen you will also need to print two of the foot-01.stl files and one foot-z.st; and one foot-eBox.stl.
The z axis/spool holder should be installed first as this part will cover up one of the screw holes for the z-axis brace/spool holder
The biggest weakness of this spool holder design is that putting 1 kg spools or bigger in that spot tends to make the printer a bit tipsy. Extra support under the z axis and with this foot should solve the problem
Designer of the USB/squashball foot this is based on said in comments he used the following USB extension
https://www.aliexpress.com/item/32949386214.html
Also, that file didnt include a stopper to hold the extension cable in place, so I grabbed one from MrBaham's version of the usb extension as a starting point and modified it to fit the extension found on Amazon.com. depending on what USB cable you use, you might need either my stopper or MrBaham's
I found this one on Amazon.com if that's easier. It does fit, and apparently you may need the 90⁰ down angle, not up. Check your printer before ordering.
ALINNA 90 Degree USB 3.0 Extension Cable, Black USB 3.0 Male to Female Extender Cord 30cm (Down Angle) https://a.co/d/aliIsn8
There is a set of four angled extension cables on Amazon that also work
In addition, you need 5 m6 T nuts and 5 m6x12mm bolts as per the instructions for the squash ball feet system.
The author remixed this model.
This variation of the USB port holder squash ball foot has been modified to be compatible with the combination z-axis support and spool holder.