Can you explain these motherboard connectors?

[ally0007]

G'day all,
Two connectors on my motherboard have me baffled. Can you help? The PC is in an HP Compaq 8200 Elite (date around 2011-2012, I think). I believe the motherboard's HP part number is 611834-001.

Firstly, there is the eSATA connector which has 25 pins. I want to install an eSATA port bracket into the case's back, but all the eSATA brackets I can find have SATA plugs! I really wanted to reserve my motherboard's few SATA sockets for HDDs and SSDs. Does anyone know where I can find an eSATA port bracket with a plug to fit the 26-pin socket shown in my photo below?

I'd also love to know what that "comb" socket is for. (It's described as "comb" in the HP Parts & Service Map for this PC, but gives no clues as to what it's for.

Many thanks!

 

[Satan-IR]

Not sure about internal eSATA header connectors and cables but I think the 15-pin is an internal serial header.

 

[Traditore]

25 pin is a parallel port connector

COMB is a serial port connector

eSATA brackets have SATA plugs because they go into SATA port on the motherboard

 

[Calvin7]

(25% of the way down page) Diagram 8200 Elite Series system board connections
https://support.hp.com/lamerica_nsc_carib-en/product/hp-compaq-6200-pro-small-form-factor-pc/5037900/document/c02742852

eSATA adapter cable (page 2 shows drawing)
https://www.elgigantenforetag.se/pdf/2C566C88-953A-4955-AFF4-C01F9B09551C.pdf

 

[ally0007]

25 pin is a parallel port connector

COMB is a serial port connector

eSATA brackets have SATA plugs because they go into SATA port on the motherboard

Ah yes - I see. Thank you so much for the help - and for your clarifying pics!