A: Yes, but you absolutely need the Dell front panel pinout (provided above). Without it, you cannot power on the system.
The front panel header is a (5x2) located near the bottom right corner of the board. placa mae dell mih61r mb 10097-1 manual
A: Officially no (lacks TPM 2.0 – though it has a TPM header, no module). Unofficially, you can bypass checks. A: Yes, but you absolutely need the Dell