knock sensors for C100 question?

[RedZMonte]

Ok, Obviously i can replace the Old knock sensor on the rear of the engine with the new style and walla. My question is where can i put the 2nd knock sensor on the front of the engine. The 1996 has a hole in the casting of the block where as my 95 does not have the hole for it..... Where else can i put that thing if anywhere and also will it be fine with just the one sensor?

S