Well just by noodling around in the attached pdf you can assume a few things.
One pin is of course at or near supply voltage.
The bias that will produce xx`milliamperes will of course vary .
And one leg is at or nearly so, at ground.
Hint look at the the test and adjustment around pg 54 and 81
The reason you're not getting a full description is I'm away from my notes, distracted, busy, would rather teach you to fish in any case, or I'm full of shit
Actually Chris embarked on a monumental project and in most ways managed to pull it off. I do recommend that you perform the bias in TX only modification controlled by the ptt.
I also recommend that you get into the menu and turn FM
down
If you have a burning desire for a QRP radio then this won't be of any use to you.
https://www.nxp.com/docs/en/quick-reference-guide/MRF101ANEKITQRC.pdf
Of course you'll need a 48-50V supply and an additional band switched LPF on the back end.
While we're polishing a turd ...
https://www.ebay.com/itm/392873830688?hash=item5b791ae920:g:jswAAOSwJdRfDt-M
See what happens when the mind wanders?