While I couldn't find anything specifically about Rev4.3, this is what I could find. Hope this helps...
Quick answer for the B2000 (Rev2)
rp101 4.7k (SIP 10 px9) processor
rp100 4.7k (SIP 10 px9) processor
https://www.digikey.com/en/products/detail/cts-resistor-products/770101472P/1000481rp901 1.0k (SIP 10 px9) coprocessor
rp900 1.0k (SIP 10 px9) coprocessor
https://www.digikey.com/en/products/detail/cts-resistor-products/770103102P/1000529more links
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http://www.devili.iki.fi/mirrors/4x4.hopto.org/a500_2000trm_6.zip - A2000TRM_B2000-1a/1b.png for the rp100/101
- RP900/901 are not on these schematics
-this link shows the RP900/901 on the board but no drop down info (B2000 rev 6.2)
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http://locator.reamiga.info/locator.php?project=A2000-this link you can find more V6 schematics. here you will find RP900/901 but no resistor values
- amigawiki.org
https://www.amigawiki.org/doku.php?id=en:service:schematics - newly rendered schematics.
- computers: A500, A600, A1200, A2000, A3000, 3000T, A4000, 4000T & CD32
- expansion: A2060, A2065, A2320, A2410, A2620, A2630, A3630, A3640, CD32 Debug board
- only certain revisions are available
- pdf searchable format
Other places for schematics
- Amiga Schematics and Manuals
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http://www.devili.iki.fi/mirrors/4x4.hopto.org/ - hand scans of schematics
- A1000, A1000 ALR manual, A2060, A0265, A2232, A3000, A500/2000 technical manuals, A500+, A501, A600, 1084, 1701, Various Tech Topics, A1200, A3400 & 1993 Developers Conference
-Amiga PCB Explorer
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http://amigapcb.org/index.php - live interactive modeling of the PCB and components
-A500, A600, A1200, A4000, A4000T, CD32, A2386sx
-Amiga technical Resource
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http://www.amiga.serveftp.net/schematics.html#A2000 - TONS of different models!!
- PDFs
-and here are a few more
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https://dev.sigpipe.me/dashie/A2000 - Amiga 2000 revision 6.2 motherboard re-done in KiCAD. Schematics and PCB done, and working, see README for notes.
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https://github.com/jasonsbeer/Amiga-2000-ATX - Develop an Amiga 2000 PCB in the EATX form factor.