Since i bought a fattywagon electrotherm ive decided to hook it up inline on my 87 300D, in the place of where the pre-filter goes.

i would like it to power on along with the glowplugs, where do i put the power wire? i already have it inline with a pre-filter after it and the ground connected to the chassis. Just trying to figure out were to plug the power cable

__________________
Current:
05 E320 CDI
07 GL320 CDI
08 Sprinter
05 Dodge Cummins
01 Dodge Cummins

Previous
2004 E55 AMG
2002 C32 AMG (#2)
1995 E300
1978 300D
1987 300D
2002 C32 AMG(blown motor :[
1981 300SD
1983 300SD
1987 300SDL
2002 Jetta TDI
1996 S420
1995 S500
1993 190E 2.6
1992 190E 2.3
1985 190E 2.3 5-Speed