Re: Sun box
The Ultra5 would have shipped with a Type 5 or Type 6 keyboard and mouse. These used an 8-pin Mini-DIN connector (PS/2 was 6-pin). The mouse was attached to the keyboard. Not to be confused with the older Type 4 keyboards which also used the same interface but didn't have a gap between the FN keys on top (all these I've seen shipped with optical mice with the blue grid metal mousepad). And easily distinguished from the Type 3 keyboards which connected to a DB-15 port and use the older optical mouse. I think I got rid of my Type 3s along with the 3/50 and the 2 4/260s (and the ELC) before the last cross country move. Still have at least 1 Type 4 and a Type 5 or two in the box of useful things.
And it's ironic the timing of this post as I just bought a dozen clear storage bins and 30' of hook and loop tape to start going through and sorting my collection of old cables and sort them by type a few weeks ago. Making it much more likely I'll be able to FIND that super special cable when I need it later. I think I'll be good on NEMA 5-15P to C13 power cables for a couple lifetimes though. Some of those are certainly headed to the metal recycler to buy some drinks instead.