The player pulls more amps than a single port on the SOL can provide. So, you need to combine two or more ports in (what's called) parallel.
From what I can tell on the CIOKS website, the parallel cables are not provided out of the box with the SOL. You need to get either one or three of these: CIOKS 8800 Flex Parallel Adapter | Sweetwater
I do not know if you need one or three (that's my question in my previous post). One post in this thread suggests that two ports may be enough (~1320mA at 9V). but the player may require four ports (three parallel cables = 2640mA) to work reliably.
Set the dip switches to the 9V-660mA setting, and then try one of the two following:
1. plug one parallel cable into ports one and two; plug a black cable into that and into the Player - check if it powers on and remains stable during playing
2. plug one parallel cable into ports one and two; plug one parallel cable into ports three and four, plug one parallel cable into the previous two parallel cables; plug a black cable into that and into the Player
#2 should definitely work, question is if two ports are sufficient.
Some more advice: if you don't feel comfortable with connecting electronic devices, find someone who can help you out with it. Making a mistake could potentially overpower and/or damage the Player.