can i connect the heater pipes without the heater connector valve?

Yes but you will have heat all the time. Add in a manual valve from the hardware store so you have some control.

You can remove the two hoses from the heater solenoid and join them together inside the Engine Bay. I used a 1/3 inch galvanized joiner pipe I found at a hardware. Broke down far from home with no tools, and lost all water after a cracked heater housing. With no tools, only needed a Plumbers pliers. Drove for weeks like that.You can get the heater housing at most spares shops, Midas, autozone etc.This Worked really well until I bought a new one.