type 44 oil pan rear 2 bolts removal - how?

[Konstantine Bogach]

I am surprised that this is not covered in archives.  2 rear bolts are
hidden. There are 2 holes in tranny support (forgive me if it is called
differently) which looks like are meant to get access to those 2 bolts
but a little 10mm socket does not fit into the holes.. Special ultrathin
socket?  Can I remove  that tranny support first? I could not find it in
ETKA and I am not sure that all bolts are accessible.  Bentley says just
drop subframe front and remove oil pan.

Thank you
Konstantin Bogach
200tq '89
200tqa '89