donator speedbox c250 td fitting help please

[rustynuts]

hi all, im new to the forum,ive recently purchased a c250 td, ive got a donator speedbox chip which i wish to fit to it, trouble is i have no fitting instructions,it has two wires which i believe join into the loom at the ecu for the rpm sensor,ive no idea which wire to join into,

has anyone got any fitting instructions,photos,
any help would be greatly apprieciated thanks in advance

[strictlyspeakin]

First off welcome.

And unfortunately I didn't see anything in search that might help out. Rather than muck around we should probably find install directions from the manufacturer first. Sorry I don't have any experience with chipping.