BMW e36 M50 Turbo Haltech platinum sport 2000

[bmwe36turbo]

Hello,

i have a few question about wiring this unit but first i can give a little specs

M50 NV fully forged and balanced engine.
pt 5558 turbo ar .64
Audi 115e or f coil
650ccm high ohm injector
255 fuel pump
6x EGT
running at BF98 and BF95 fuel

First question and challenge that i have found is how do i connect the BMW rpm gange and water gauge?
and have someone did the same ECU on e36 before that maby can help me so that i dont use alot og time with this mount?

do i take ground for the fuelpump from the ground to ECU or can i just put it in the chassis near the fuel pump ?

and do anyone have a ground map that i can base my tuning on ? so that i can drive it away from the shop, of corce very nicely at low rpm and no boost